Polterghast

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PolterghastPhase 1
Polterghast.png
Polterghast map.png
Map icon
Statistics
TypeBoss
EnvironmentDungeon
DamageThis attack will cause defense damage on hit. 150 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode / 384 Master Mode (Contact)
140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode / 396 Master Mode (Blue Phantom Shot)
This attack will cause defense damage on hit. 150 / 264 Expert Mode / 288 Revengeance Mode / 300 Death Mode / 432 Master Mode (Blue Phantom Blast)
Max Life350,000 / 560,000 Expert Mode /
672,000 Revengeance Mode / 840,000 Master Mode / 1,008,000 Revengeance Mode Master Mode
Defense90
DR20%
KB Resist100%
Inflicts debuffMoon BiteMoon Bite
100% chance

Debuff duration15 seconds (Contact)
Debuff tooltipYou are unable to absorb healing effects
Inflicts debuffNightwitherNightwither
100% chance

Debuff duration2 seconds (Blue Phantom Blast)
1.33 seconds (Blue Phantom Shot)
Debuff tooltipIncinerated by lunar rays
Immune toConfusedPearl AuraNightwitherWhispering Death
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.png-
PolterghastPhase 2
Polterghast (Phase 2).png
Polterghast map.png
Map icon
Statistics
TypeBoss
EnvironmentDungeon
DamageThis attack will cause defense damage on hit. 180 / 288 Expert Mode / 316 Revengeance Mode / 336 Death Mode / 460 Master Mode (Contact)
150 / 264 Expert Mode / 288 Revengeance Mode / 300 Death Mode / 432 Master Mode (Red Phantom Shot)
This attack will cause defense damage on hit. 160 / 276 Expert Mode / 304 Revengeance Mode / 320 Death Mode / 456 Master Mode (Red Phantom Blast)
Max Life175,000 / 350,000
364,000 / 560,000 Expert Mode
537,600 / 672,000 Revengeance Mode
604,800 / 672,000 Death Mode
546,000 / 840,000 Master Mode
806,400 / 1,008,000 Revengeance Mode Master Mode
907,200 / 1,008,000 Death Mode Master Mode
Defense72
DR20%
KB Resist100%
Inflicts debuffMoon BiteMoon Bite
100% chance

Debuff duration15 seconds (Contact)
Debuff tooltipYou are unable to absorb healing effects
Inflicts debuffWhispering DeathWhispering Death
100% chance

Debuff duration2 seconds (Red Phantom Blast)
1.33 seconds (Red Phantom Shot)
Debuff tooltipDeath approaches; attack power and life regen reduced
Immune toConfusedPearl AuraNightwitherWhispering Death
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.png-
PolterghastPhase 3
Polterghast (Phase 3).png
Polterghast Phase 3 map.png
Map icon
Statistics
TypeBoss
EnvironmentDungeon
DamageThis attack will cause defense damage on hit. 210 / 336 Expert Mode / 369 Revengeance Mode / 392 Death Mode / 537 Master Mode (Contact)
Max Life70,000 / 350,000
196,000 / 560,000 Expert Mode
336,000 / 672,000 Revengeance Mode
403,200 / 672,000 Death Mode
294,000 / 840,000 Master Mode
504,000 / 1,008,000 Revengeance Mode Master Mode
604,800 / 1,008,000 Death Mode Master Mode
Defense45
DR20%
KB Resist100%
Inflicts debuffMoon BiteMoon Bite
100% chance

Debuff duration15 seconds (Contact)
Debuff tooltipYou are unable to absorb healing effects
Immune toConfusedPearl AuraNightwitherWhispering Death
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.png-
Drops
Coins 3 Platinum Coin.png 50 Gold Coin.png
Sounds
Not to be confused with Poltergeist, a vanilla enemy.

Polterghast Trophy.png "Long-dead prisoners seek their zealous revenge..." Polterghast Trophy.png

Polterghast is a post-Moon Lord boss that can be fought in the Dungeon. While it is optional, it is highly recommended to fight it before challenging The Devourer of Gods.

Defeating Polterghast will provide the player with Ruinous Souls, a material used to craft powerful equipment. Additionally, minibosses in the Abyss will begin dropping weapons upon its defeat, and the final tier of the Acid Rain event will become unlocked.

Summoning

Polterghast can be summoned by using a Necroplasmic Beacon in the Dungeon. Alternatively, if it has not yet been defeated in the world, it will spawn after killing 30 Phantom Spirits, which can be found in the Dungeon after Moon Lord has been defeated. After defeating it once, using a Necroplasmic Beacon becomes the only way to summon the boss.

Behavior

Polterghast behaves similarly to Plantera, chasing the player quickly while using four long appendages to grapple blocks. In the second phase, however, these appendages will detach and begin firing projectiles independently, before re-attaching in the final phase as Polterghast summons an unbound clone of itself.

If the player travels to the surface, Polterghast will enrage, gaining a speed boost until they return. If they remain on the surface for over 10 seconds, Polterghast will accelerate away and despawn.

Phase 1

  • Polterghast follows a Plantera-like behavior, placing its hooks on nearby walls to quickly pull itself towards the player.
  • Polterghast alternates between moving slowly while firing a spread of 5 slow, cyan coloured Phantom ShotPhantom Shots and moving more quickly while firing a spread of 4 fast, homing Phantom BlastPhantom Blasts that move through blocks.
  • Polterghast periodically stops shooting projectiles and glows red, positioning itself diagonally to the player before charging at them once.
  • Transforms at 50% / 65% Expert Mode / 80% Revengeance Mode / 90% Death Mode health.

Phase 2

  • Polterghast's hooks detach from their chains, and they begin independently moving and shooting ghostly projectiles at the player.
  • Polterghast moves more quickly and deals more contact damage.
  • Polterghast begins firing a spread of 5 Phantom Ghost ShotPotent Phantom Shots or Phantom Blast2Blasts, which are red projectiles that travel faster, further, and deal slightly more damage.
  • Polterghast charges a second time while it is glowing red.
  • Transforms at 20% / 35% Expert Mode / 50% Revengeance Mode / 60% Death Mode health.

Phase 3

  • Upon entering Phase 3, Polterghast summons a clone of itself, as well as 3 Phantoms. The clone behaves similar to Polterghast, staying within the hooks and alternating with Polterghast in chasing the player, while the Phantoms orbit Polterghast and occasionally fire Polterghast MinePhantom Mines that gradually accelerate over time.
    • Both the Clone and the Phantoms can be killed; however, killing the clone will increase Polterghast's aggression.
  • Polterghast's hooks move slower and less often. The chains reappear and the hooks no longer shoot projectiles.
  • Polterghast moves significantly faster and deals even more contact damage. Additionally, it fires a spread of 6 Shots every 7 seconds.
  • While glowing, the clone positions itself on the other side of Polterghast and charges up to 3 times in tandem with Necroplasm.
    • If the clone has been killed, Polterghast charges 4 times instead, and its charges are much faster.
    • The Phantoms cannot shoot Phantom Mines while Polterghast is charging.
  • When below 10% / 20% Expert Mode / 35% Revengeance Mode / 45% Death Mode health, Polterghast begins summoning up to 2 Happy Phantom Spirits, which also fire ghostly projectiles at the player.
  • When below 5% / 10% Expert Mode / 15% Revengeance Mode / 20% Death Mode health, Polterghast begins to move more quickly as a last-ditch effort to attack the player and will also stop summoning Happy Phantom Spirits.

In Expert Mode

  • Polterghast's velocity and acceleration are greater in all three phases.
  • The rate Polterghast fires Phantom Shots and Phantom Blasts is increased.
    • This includes their red versions in later phases.
  • Polterghast's hooks can travel further between latches.
  • In its third phase, Polterghast summons three invincible Phantoms which slowly revolve around itself. The Phantoms fire phantom orb mines which are initially slow, but quickly accelerate toward the player.
    • The phantom orb mines will not deal damage until they reach maximum velocity.

In Revengeance Mode

  • Polterghast's velocity and acceleration are even greater in all three phases.
  • Transitions into Phase 3 at 50% health instead of 33%.
  • Spawns Happy Phantom Spirits at 33% health instead of 20%.
  • Moves much faster at 10% health instead of 5% health.
  • Phantoms shoot more often.

In Death Mode

  • Transitions into Phase 2 at 90% health instead of 80%.
  • Transitions into Phase 3 at 60% health instead of 50%.
  • Moves much faster at 25% health instead of 10% health.
  • Phantoms Spirits shoot at an even higher frequency.
  • Gains velocity and acceleration as HP decreases.
  • Can hook increased distances as HP decreases.
  • Hooks fire faster and more often as HP decreases.

On the For the worthy seed

  • Charges twice as frequently.
  • Phantoms fire twice as fast and orbit at triple speed.

Summons

Polterghast Hook
Polterghast Hook.png
Statistics
TypeEnemy
EnvironmentDungeon
Damage0 (Contact)
140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode / 396 Master Mode (Hook Shot)
Max Life50,000
Defense50
KB Resist0% / 10% Expert Mode / 20% Master Mode
Inflicts debuffNightwitherNightwither
100% chance

Debuff duration1.33 seconds (Phantom Shot)
Debuff tooltipIncinerated by lunar rays
Immune toAll debuffs except:
EnragedShellfish ClapsSpite
PolterghastClone
Polterghast (Clone).png
Polterghast (Clone) map.png
Map icon
Statistics
TypeFlying Enemy
EnvironmentDungeon
DamageThis attack will cause defense damage on hit. 210 / 336 Expert Mode / 360 Revengeance Mode / 392 Death Mode / 528 Master Mode
Max Life62,500 / 100,000 Expert Mode / 120,000 Revengeance Mode / 150,000 Master Mode / 180,000 Revengeance Mode Master Mode
Defense45
DR10%
KB Resist100%
Inflicts debuffMoon BiteMoon Bite
100% chance

Debuff duration6 seconds (Contact)
Debuff tooltipYou are unable to absorb healing effects
Immune toAll debuffs except:
EnragedKami FluShellfish ClapsSpite
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.png-
Phantom
Phantom.png
Statistics
TypeFlying Enemy
EnvironmentDungeon
Damage0 (Contact)
This attack will cause defense damage on hit. 170 / 296 Expert Mode / 324 Revengeance Mode / 340 Death Mode / 462 Master Mode (Phantom Mine)
Max Life17,500 / 22,500 Expert Mode / 37,500 Revengeance Mode
Defense45
DR10%
KB Resist100%
Inflicts debuffNightwitherNightwither
100% chance

Debuff duration2 seconds (Phantom Mine)
Debuff tooltipIncinerated by lunar rays
Inflicts debuffWhispering DeathWhispering Death
100% chance

Debuff duration3 seconds (Phantom Mine)
Debuff tooltipDeath approaches; attack power and life regen reduced
Immune toAll debuffs except:
EnragedShellfish ClapsSpite
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.png-
Image Name Condition
Happy Phantom Spirit Happy Phantom Spirit Phase 3

Aftermath

Notes

  • Polterghast moves faster if it is currently inside tiles.
  • Polterghast will turn red and the clone will briefly turn invisible when preparing a charge.

Tips

For more elaborate strategies on defeating Polterghast, including weapon and arena recommendations, see Guide:Polterghast strategies.
  • Polterghast has similar AI to Plantera, which means that movement strategies used during that boss fight may work here as well.
  • Slowing down and observing how Polterghast behaves shortly before each of its telegraphed dashes would help dodging it, as the boss will only dash diagonally from where it is positioning itself relative to the player.
    • For phase 3 especially, dodging towards an axis parallel to where Polterghast and its clone line up would make dodging both a lot easier.
  • Don't rush too much when fighting its last form. The chaotic activity can easily overwhelm the player if they're careless. Take your time and be careful when dodging.
  • Polterghast can be fought before any post-Moon Lord boss is defeated, although it is highly recommended to defeat Providence and the Rune of Kos bosses first. Polterghast's high speed, damage, and projectiles can easily overwhelm an unprepared player.

Trivia

  • The BestiaryBestiary entry for Polterghast: "The feral amalgamation that drove out the cult that once dwelled here, and inadvertently broke an alliance thought to be eternal. Many have delved into the dungeon in search of riches and knowledge long since lost, yet most simply join the spirits that have claimed this place as their own."
  • Polterghast's theme is Feral Amalgamation, which was made by the artist DM DOKURO.
    • Polterghast's theme used to be Ruin, a remix of "In the Hall of the Mountain King" from the game The End is Nigh.
  • Polterghast's clone in Phase 3 was inspired by Pontiff Sulyvahn, a boss from the game Dark Souls III.
  • The boss changed its name as it entered new phases in earlier versions of the mod.
    • The multiple names were the result of a disagreement between the boss's spriter, LordMetarex, and the lead developer, Fabsol/MountainDrew. The spriter was naming his files ‘Necroplasm' and was using it as the official name for the boss. During a spoiler, the official name was revealed to be ‘Polterghast'. After an argument the developer decided to use ‘Polterghast' for the first phase and ‘Necroplasm' for the last phase. ‘Necroghast', being a combination of the two names, was used for phase two.
      • The name "Necroplasm" has since been recycled for the item of the same name.
  • Polterghast can be summoned after the Moon Lord is defeated, as Phantom Spirits begin spawning and its summoning item only requires Wood and Necroplasm.
  • If the Boss Checklist Mod is installed, its unique despawn message will be "The volatile phantasm disperses in an echoing wail."
  • In the mod's source files, Phantoms are referred to as 'PhantomFuckYou'.

History

These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • 2.0.4.001:
    • Now properly scales health in Master Mode. This should result in lower health overall.
    • Buffed contact damage from 150 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode / 384 Master Mode to 160 / 240 Expert Mode / 264 Revengeance Mode / 288 Death Mode / 480 Master Mode, and clone's damage in Classic Mode from 210 / 336 Expert Mode / 360 Revengeance Mode / 392 Death Mode / 528 Master Mode to 224 / 336 Expert Mode / 370 Revengeance Mode / 403 Death Mode / 528 Master Mode.
    • Buffed blue phantom shot damage from 140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode / 396 Master Mode to 140 / 240 Expert Mode / 264 Revengeance Mode / 288 Death Mode / 420 Master Mode, red phantom shot and blue phantom blast damage from 150 / 264 Expert Mode / 288 Revengeance Mode / 300 Death Mode / 432 Master Mode to 150 / 264 Expert Mode / 288 Revengeance Mode / 312 Death Mode / 450 Master Mode, red phantom blast damage from 160 / 276 Expert Mode / 304 Revengeance Mode / 320 Death Mode / 456 Master Mode to 160 / 276 Expert Mode / 304 Revengeance Mode / 332 Death Mode / 480 Master Mode, and phantom mine damage from 170 / 296 Expert Mode / 324 Revengeance Mode / 340 Death Mode / 462 Master Mode to 170 / 296 Expert Mode / 324 Revengeance Mode / 352 Death Mode / 510 Master Mode.
    • No longer uses a global scaling contact damage formula based on boss velocity.
    • Clone and Phantoms are no longer immune to lifesteal.
    • Name no longer changes in later phases or in the Get fixed boi seed.
    • Now deals half contact damage while not charging.
    • Clone now deals half contact damage while not charging.
  • 2.0.3.005:
    • Decreased phantom blast and phantom mine Nightwither duration from 3 seconds to 2.
    • Decreased phantom shot Nightwither duration from 2 seconds to 1.33.
  • 2.0.3.002:
    • No longer gains increased aggression level depending on the amount of surrounding tiles, with its current base aggression level being increased to match its previous 50% tile aggression level.
    • Phantom is now affected by the Boss Health Boost Percentage configuration option.
  • 2.0.3.001:
    • Changed clone health from 35,000 / 72,000 Expert Mode / 120,000 Revengeance Mode / 144,000 Death Mode / 108,000 Master Mode / 180,000 Revengeance Mode Master Mode / 216,000 Death Mode Master Mode to 62,500 / 100,000 Expert Mode / 120,000 Revengeance Mode / 150,000 Master Mode / 180,000 Revengeance Mode Master Mode.
    • Nerfed Phantom's health from 17,500 / 22,500 Expert Mode / 37,500 Revengeance Mode / 45,000 Death Mode to 17,500 / 22,500 Expert Mode / 37,500 Revengeance Mode.
    • Clone is no longer trackable by the vanilla boss health bar.
  • 2.0.2.002:
    • Changed Boss Checklist Mod despawn message from "The volatile spirits disperse throughout the depths of the dungeon." to "The volatile phantasm disperses in an echoing wail."
    • It, Phantom Hook, Polterghast Clone and Phantom now properly display vanilla debuff colors and Hunter Potion effects.
  • 2.0.1.002: Added boss spawning, phase transition, Phantom Spirit spawning and hit sounds.
  • 1.5.1.001:
    • Buffed Blue Phantom Blast damage from 140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode to 150 / 264 Expert Mode / 288 Revengeance Mode / 300 Death Mode.
    • Buffed Blue Phantom Shot damage from 120 / 192 Expert Mode / 212 Revengeance Mode / 224 Death Mode to 140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode.
    • Buffed Phantom contact damage from 150 / 260 Expert Mode / 288 Revengeance Mode / 304 Death Mode to 160 / 276 Expert Mode / 304 Revengeance Mode / 320 Death Mode.
    • Buffed Phantom Hook Shot damage from 120 / 192 Expert Mode / 212 Revengeance Mode / 224 Death Mode to 140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode.
    • Buffed Phantom Mine damage from 160 / 276 Expert Mode / 304 Revengeance Mode / 320 Death Mode to 170 / 296 Expert Mode / 324 Revengeance Mode / 340 Death Mode.
    • Buffed Red Phantom Blast damage from 150 / 260 Expert Mode / 288 Revengeance Mode / 304 Death Mode to 160 / 276 Expert Mode / 304 Revengeance Mode / 320 Death Mode.
    • Buffed Red Phantom Shot damage from 130 / 212 Expert Mode / 236 Revengeance Mode / 248 Death Mode to 150 / 264 Expert Mode / 288 Revengeance Mode / 300 Death Mode.
    • No longer reduces the effectiveness of Cursed Inferno's damage reduction loss.
    • Necroplasm and its clone no longer charge predictively in Revengeance or Death Mode.
    • Phantoms can now be damaged. Buffed health from 1500 to 8750 / 11,250 Expert Mode / 18,750 Revengeance Mode / 22,500 Death Mode, damage reduction from 0% to 10%, and defense from 0 to 45. Increased Phantom Mine's acceleration by 9.5% and increased tile enrage effect on Phantom Mines by 50%.
    • Polterghast clone can now be damaged. Nerfed health from 130,000 / 208,000 Expert Mode / 240,000 Revengeance Mode to 35,000 / 72,000 Expert Mode / 120,000 Revengeance Mode / 144,000 Death Mode. Buffed damage reduction from 0% to 10% and defense from 0 to 45.
      • Defeating the clone will increase the number and spread of projectiles, the projectile firing rate, charge velocity and acceleration, and amount of charges.
    • It, its clone, and Phantoms are now resistant to sickness debuffs.
    • Now drops Affliction regardless of world difficulty.
  • 1.5.0.002: Map icon now rotates alongside the boss.
  • 1.5.0.001:
    • Added a separate map icon for Necroplasm.
    • Nerfed health from 412,500 / 660,000 Expert Mode / 792,000 Revengeance Mode to 350,000 / 560,000 Expert Mode / 672,000 Revengeance Mode.
    • Nerfed Boss Rush health from 3,250,000 / 5,200,000 Expert Mode to ​​325,000 / 520,000 Expert Mode.
    • No longer immune to any debuffs except Confused, Pearl Aura, Nightwither, and Whispering Death.
    • Phantom Shot projectiles can no longer bounce off of tiles.
    • Mine projectiles now use a circular hitbox.
    • When it or its clone is moving slowly, its core will now change from red to black.
    • Now sticks to a charge location once it finds one and will now wait for 15 frames before charging.
    • Will now look in the direction it is about to charge in.
    • Increased tile detection enrage by 20%.
    • Can no longer become enraged during Boss Rush.
    • Now takes 90% damage from Time Bolt, and 75% damage from Grand Dad.
    • Now drops 30-40 / 40-50 Expert Mode Phantoplasm instead of 10-20 / 20-30 Expert Mode.
    • Phantom Shot projectiles now inflict Whispering Death for 2 seconds on hit. Phantom Hook Shot projectiles now inflict Nightwither for 2 seconds on hit.
    • Now drops Supreme Healing Potions.
  • 1.4.5.004: Clone now turns invisible, except for a red glowmask for its heart and veins, to convey that it's not dealing contact damage while it lines up for a charge.
  • 1.4.5.003:
    • Nerfed base contact damage from 150 / 240 Expert Mode / 300 Revengeance Mode / 345 Death Mode to 150 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode.
    • Nerfed Necroghast contact damage from 180 / 288 Expert Mode / 360 Revengeance Mode / 414 Death Mode to 180 / 288 Expert Mode / 316 Revengeance Mode / 336 Death Mode.
    • Nerfed Necroplasm contact damage from 210 / 336 Expert Mode / 420 Revengeance Mode / 483 Death Mode to 210 / 336 Expert Mode / 369 Revengeance Mode / 392 Death Mode.
    • Nerfed clone damage from 210 / 336 Expert Mode / 420 Revengeance Mode / 483 Death Mode to 210 / 336 Expert Mode / 360 Revengeance Mode / 392 Death Mode.
    • Buffed Blue Phantom Shot damage from 120 / 192 Expert Mode / 211 Revengeance Mode / 222 Death Mode to 120 / 192 Expert Mode / 212 Revengeance Mode / 224 Death Mode.
    • Buffed Blue Phantom Blast damage from 140 / 240 Expert Mode / 264 Revengeance Mode / 278 Death Mode to 140 / 240 Expert Mode / 264 Revengeance Mode / 280 Death Mode.
    • Buffed Red Phantom Shot damage from 130 / 212 Expert Mode / 233 Revengeance Mode / 245 Death Mode to 130 / 212 Expert Mode / 236 Revengeance Mode / 248 Death Mode.
    • Buffed Red Phantom Blast damage from 150 / 260 Expert Mode / 286 Revengeance Mode / 301 Death Mode to 150 / 260 Expert Mode / 288 Revengeance Mode / 304 Death Mode.
    • Buffed Phantom Mine damage from 150 / 260 Expert Mode / 286 Revengeance Mode / 301 Death Mode to 150 / 260 Expert Mode / 288 Revengeance Mode / 304 Death Mode.
    • Buffed Hook Phantom Shot damage from 120 / 192 Expert Mode / 211 Revengeance Mode / 222 Death Mode to 120 / 192 Expert Mode / 212 Revengeance Mode / 224 Death Mode.
    • Adjusted tile enrage to affect its projectiles more.
    • Now charges towards the player at certain intervals.
    • Phantom blasts no longer home in and instead accelerate over time.
    • Mines no longer deal any damage until they've reached max velocity, and mine velocity is now affected by tile enrage.
    • How often hooks move is now based on how close the player is to them.
    • Hooks can fire projectiles again.
    • Now enters Phase 3 at 60% health instead of 80% in Death Mode.
    • Fixed a bug that caused its attacks to desync in multiplayer.
  • 1.4.5.002: Reduced tile enrage requirement by 25%.
  • 1.4.5.001:
    • Boss fight has been reworked; now much more aggressive.
    • Blue and red phantom projectiles now inflict Nightwither and Whispering Death respectively. Projectile patterns have also been adjusted to make the fight more fair.
    • Both it and its clone can now inflict Moon Bite on contact.
    • Phantoms now orbit Polterghast itself instead of the player.
    • No longer immune to Betsy's Curse or Ichor.
  • 1.4.4.001: It and its Hooks now have glowmasks.
  • 1.4.3.002:
    • Buffed phase 1's damage reduction from 10% to 15%, phase 2's damage reduction from 15% to 20%, and phase 3's damage reduction from 35% to 50%.
    • Clone is now invincible.
    • No longer gains damage reduction while its clone is alive.
    • Increased Ruinous Soul drop count from 5-8 / 6-10 Expert Mode to 7-15 / 10-20 Expert Mode.
    • Will now despawn if it can't find a target.
    • It and its clone are no longer immune to Celled, Daybroken, or Oiled.
  • 1.4.3.001:
    • Nerfed Polterghast's contact damage from 150 / 240 Expert Mode / 300 Revengeance Mode / 345 Death Mode to 150 / 240 Expert Mode / 264 Revengeance Mode / 278 Death Mode.
    • Nerfed Necroghast's contact damage from 180 / 288 Expert Mode / 360 Revengeance Mode / 413 Death Mode to 180 / 288 Expert Mode / 316 Revengeance Mode / 334 Death Mode.
    • Nerfed Necroplasm's contact damage from 210 / 336 Expert Mode / 420 Revengeance Mode / 482 Death Mode to 210 / 336 Expert Mode / 369 Revengeance Mode / 389 Death Mode.
    • Nerfed clone Polterghast's damage from 210 / 336 Expert Mode / 420 Revengeance Mode / 482 Death Mode to 210 / 336 Expert Mode / 369 Revengeance Mode / 389 Death Mode.
    • Nerfed blue shot damage from 120 / 192 Expert Mode / 240 Revengeance Mode / 276 Death Mode to 120 / 192 Expert Mode / 211 Revengeance Mode / 222 Death Mode.
    • Nerfed red shot damage from 130 / 212 Expert Mode / 265 Revengeance Mode / 304 Death Mode to 130 / 212 Expert Mode / 233 Revengeance Mode / 245 Death Mode.
    • Nerfed blue blast damage from 140 / 240 Expert Mode / 300 Revengeance Mode / 345 Death Mode to 140 / 240 Expert Mode / 264 Revengeance Mode / 278 Death Mode.
    • Nerfed red blast damage from 150 / 260 Expert Mode / 325 Revengeance Mode / 373 Death Mode to 150 / 260 Expert Mode / 286 Revengeance Mode / 301 Death Mode.
    • Nerfed hook shot damage from 120 / 192 Expert Mode / 240 Revengeance Mode / 276 Death Mode to 120 / 192 Expert Mode / 211 Revengeance Mode / 222 Death Mode.
    • Nerfed Phantom's mine damage from 150 / 248 Expert Mode / 310 Revengeance Mode / 356 Death Mode to 150 / 248 Expert Mode / 272 Revengeance Mode / 287 Death Mode.
    • Can now charge at the player in all phases.
    • Slightly nerfed projectile speed of Polterghast Hook Shots.
    • Slightly nerfed charge speed in Phases 3-5 in Expert Mode and Boss Rush.
    • Now fires a spread of 4 Phantom Shots in Phases 3-5.
    • Phantom Shots no longer accelerate.
    • Phantoms now gradually rotate faster as Polterghast's health lowers.
    • Decreased limit of Happy Phantom Spirit spawns in Revengeance Mode from 3 to 2.
    • Death Mode changes:
      • Transitions into Phase 2 below 90% health instead of 75%.
      • Transitions into Phase 3 below 80% health instead of 50%.
      • Transitions into Phase 4 below 50% health instead of 33%.
      • Transitions into Phase 5 below 25% health instead of 10%.
      • Decreased Phantom's projectile firing rate.
      • Decreased Polterghast Hook's maximum speed and firing rate.
      • Polterghast Hooks move at the highest speed immediately, instead of gradually speeding up as health lowers.
  • 1.4.2.106:
    • Buffed Boss Rush health from 2,500,000 / 4,000,000 Expert Mode / 4,480,000 Death Mode to 3,250,000 / 5,200,000 Expert Mode / 5,600,000 Death Mode.
    • Nerfed base defense from 150 to 90.
    • Buffed blue Phantom Shot damage from 110 / 184 Expert Mode to 120 / 192 Expert Mode, and blue Phantom Blast damage from 120 / 204 Expert Mode to 140 / 240 Expert Mode.
    • Buffed red Phantom Shot damage from 120 / 196 Expert Mode to 130 / 212 Expert Mode, and red Phantom Blast damage from 130 / 212 Expert Mode to 150 / 260 Expert Mode.
    • Buffed Polterghast's Hook's health from 50,000 to 100,000.
    • Nerfed Polterghast's Hook's Phantom Shot damage from 240 Expert Mode to 192 Expert Mode.
    • Buffed Phantom's health from 1500 to 1500 / 3000 Expert Mode.
    • Buffed Phantom's Phantom Mine damage from 140 / 232 Expert Mode to 150 / 248 Expert Mode.
    • Now drops 10-20 / 20-30 Expert Mode Phantoplasm.
    • The Reaper Shark's roar will now play when defeated for the first time.
  • 1.4.2.105:
    • Hooks no longer have additional health boosts in Revengeance and Death Mode, no longer has any defense, and no longer deals contact damage at all.
    • Hooks now only fire projectiles in phase 2.
    • Phantom Blasts now pierce through the player.
    • Phantom Shots now accelerate slower.
    • Phantoms now fire more frequently.
    • Decreased aggressiveness.
    • The clone now has its own health bar.
  • 1.4.2.103: Now only enrages when taken to the surface.
  • 1.4.2.102: Decreased overall aggressiveness, especially during its enrage.
  • 1.4.2.101:
    • Decreased first phase's speed.
    • Phantom shots now despawn quicker but are faster.
  • 1.4.2.002: Fixed an error where the internal value for it wasn't resetting.
  • 1.4.2.001:
    • Nerfed health from 550,000 / 880,000 Expert Mode / 1,056,000 Revengeance Mode / 1,408,000 Death Mode to 412,500 / 600,000 Expert Mode / 792,000 Revengeance Mode / 1,056,000 Death Mode.
    • Nerfed Boss Rush health from 7,000,000 / 11,200,000 Expert Mode / 12,160,000 Death Mode to 2,500,000 / 4,000,000 Expert Mode / 4,480,000 Death Mode.
    • Nerfed clone's Boss Rush health from 1,700,000 / 2,720,000 Expert Mode / 3,360,000 Death Mode to 900,000 / 1,440,000 Expert Mode / 1,760,000 Death Mode.
    • Decreased minimum coin drop count from 1 Platinum Coin.png 20 Gold Coin.png to 60 Gold Coin.
    • Ichor no longer affects specialized damage resistance formula.
    • Hook phantom shots now use custom projectiles.
    • Projectiles now have more descriptive names.
    • Now has gores.
    • Clone can no longer be lifestealed off of.
    • Fixed clone exponentially gaining contact damage while outside of the Dungeon.
  • 1.4.1.003:
    • Buffed health from 440,000 / 704,000 Expert Mode / 816,000 Revengeance Mode / 1,128,000 Death Mode to 550,000 / 880,000 Expert Mode / 1,056,000 Revengeance Mode / 1,408,000 Death Mode, and Boss Rush health from 6,000,000 / 9,600,000 Expert Mode / 10,560,000 Death Mode to 7,000,000 / 11,200,000 Expert Mode / 12,160,000 Death Mode.
    • Decreased minimum coin drop amount from 5 Platinum Coin to 1 Platinum Coin.png 20 Gold Coin.png.
  • 1.4.1.001:
    • Buffed Boss Rush health from 5,400,000 / 8,640,000 Expert Mode / 9,600,000 Death Mode to 6,000,000 / 9,600,000 Expert Mode / 10,560,000 Death Mode.
    • Buffed clone's Boss Rush health from 1,500,000 / 2,400,000 Expert Mode / 3,040,000 Death Mode to 1,700,000 / 2,720,000 Expert Mode / 3,360,000 Death Mode.
    • Buffed Boss Rush damage modifier from 1.75x to 2x.
    • Hooks now fire phantom shots less frequently.
    • It, its clone, and its hooks now only inflict Horror in Revengeance Mode.
    • It and its clone no longer take 12.5% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.
    • It and its clone no longer take 50% damage from ranged projectiles while Vortex armor's stealth ability is active.
    • Now has gores.
  • 1.4.0.002: Fixed enraged boss gaining exponential amounts of defense and contact damage.
  • 1.4.0.001:
    • Buffed health from 420,000 / 672,000 Expert Mode / 784,000 Revengeance Mode / 1,064,000 Death Mode to 440,000 / 704,000 Expert Mode / 816,000 Revengeance Mode / 1,128,000 Death Mode.
    • Lowered resistance to Ichor slightly.
    • Fixed a sheeting error.
  • 1.3.4.101:
    • Buffed health from 300,000 / 480,000 Expert Mode / 560,000 Revengeance Mode / 760,000 Death Mode to 420,000 / 672,000 Expert Mode / 784,000 Revengeance Mode / 1,064,000 Death Mode.
    • Nerfed damage reduction in phase 1 from 50% to 10%, in phase 2 from 55% to 15%, and in phase 3 from 60% to 20%. Still has 90% damage reduction while the clone is alive.
    • Resprited Necroplasm.
  • 1.3.4.001:
    • Nerfed health from 330,000 / 528,000 Expert Mode / 560,000 Revengeance Mode / 1,000,000 Death Mode to 300,000 / 480,000 Expert Mode / 560,000 Revengeance Mode / 760,000 Death Mode.
    • It and its clone are longer immune to Abyssal Flames, Demon Flames, God Slayer Inferno, Nightwither, or Shred.
    • It and its clone now take 12.5% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets instead of 25%.
    • Tweaked damage resistance formula.
  • 1.3.3.011:
    • Now takes 25% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.
    • Can now drop a Polterghast Trophy.
    • Polterghast's clone now takes 50% damage if the player has Vortex armor's stealth active and 25% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.
  • 1.3.3.001:
    • Buffed Polterghast Hook's health from 20,000 to 50,000 / 60,000 Revengeance Mode / 100,000 Death Mode.
    • Now spawns a clone in phase 3.
    • No longer fires shots in phase 3.
    • Polterghast Hooks will now detach in phase 2, and periodically open up and fire phantom shots.
    • 3 Phantoms will now spawn and orbit the player closely instead of a single Phantom keeping a distance from the player.
    • Blue phantom shots now bounce 4 times instead of 2, and pink phantom shots now bounce 5 times instead of 3.
  • 1.3.2.001:
    • Nerfed contact damage from 200 / 320 Expert Mode to 150 / 240 Expert Mode.
    • Nerfed dart damage from 240 / 300 Expert Mode / 315 Revengeance Mode / 450 Death Mode to 110 / 184 Expert Mode / 193 Revengeance Mode / 276 Death Mode.
    • Nerfed blast damage from 260 / 340 Expert Mode / 357 Revengeance Mode / 510 Death Mode to 120 / 204 Expert Mode / 214 Revengeance Mode / 306 Death Mode.
    • Nerfed red dart damage from 300 / 340 Expert Mode / 357 Revengeance Mode / 510 Death Mode to 120 / 196 Expert Mode / 205 Revengeance Mode / 294 Death Mode.
    • Nerfed red blast damage from 320 / 380 Expert Mode / 399 Revengeance Mode / 570 Death Mode to 130 / 216 Expert Mode / 226 Revengeance Mode / 324 Death Mode.
    • Nerfed Polterghast Hook's damage from 180 / 252 Expert Mode / 264 Revengeance Mode / 378 Death Mode to 120 / 168 Expert Mode / 176 Revengeance Mode / 252 Death Mode.
    • Nerfed Phantom's phantom mine projectile damage from 320 / 380 Expert Mode / 399 Revengeance Mode / 570 Death Mode to 140 / 232 Expert Mode / 243 Revengeance Mode / 348 Death Mode.
    • Now spawns more phantom mines.
    • Resprited Phantom Mine.
  • 1.3.0.001:
    • Nerfed base contact damage from 215 / 344 Expert Mode to 200 / 320 Expert Mode.
    • Nerfed hook damage from 220 / 308 Expert Mode to 180 / 252 Expert Mode.
    • Lowered the amount of contact damage it gains each phase.
    • Lowered the amount of Phantom Turrets it spawns from 3 Expert Mode / 2 Death Mode to 2 Expert Mode / 1 Death Mode.
    • Now spawns 3 Expert Mode / 2 Death Mode Happy Phantom Spirits instead of 5 Expert Mode / 3 Death Mode normal ones.
    • Now sends a status message upon its first defeat, signaling that certain Abyss enemies gain new drops.
  • 1.2.4.101:
    • Buffed Death Mode health from 672,000 Death Mode to 1,000,000 Death Mode.
    • Normal phantom shots no longer bounce 2 extra times in Death Mode.
    • Red phantom shots no longer bounce 3 extra times in Death Mode.
    • Now drops Ectoheart in Revengeance Mode.
  • 1.2.3.008:
    • Now drops 5-9 / 6-11 Expert Mode Ruinous Souls instead of 12-19 / 15-21 Expert Mode.
    • Phantoms now spawn phantom mines.
  • 1.2.3.005: Phantom shots now pierce 4 times in Death Mode, but now pierce twice in every other mode instead of 4 times in all modes.
  • 1.2.3.002:
    • Now gets 672,000 Death Mode health in Death Mode.
    • Laser arms now spawn in phase 2 instead of phase 3 in Death Mode.
  • 1.2.3.001:
    • Buffed health from 260,000 / 416,000 Expert Mode / 448,000 Revengeance Mode to 330,000 / 528,000 Expert Mode / 560,000 Revengeance Mode, and base contact damage from 175 / 280 Expert Mode / 350 Revengeance Mode to 215 / 344 Expert Mode / 430 Revengeance Mode.
    • Buffed phantom shot damage from 130 / 260 Expert Mode / 325 Revengeance Mode to 240 / 300 Expert Mode / 375 Revengeance Mode.
    • Buffed phantom blast damage from 170 / 340 Expert Mode / 425 Revengeance Mode to 260 / 340 Expert Mode / 425 Revengeance Mode.
    • Buffed red phantom shot damage from 150 / 300 Expert Mode / 375 Revengeance Mode to 300 / 340 Expert Mode / 425 Revengeance Mode.
    • Buffed red phantom blast damage from 190 / 380 Expert Mode / 475 Revengeance Mode to 320 / 380 Expert Mode / 475 Revengeance Mode.
    • Phantom shots now bounce 4 times instead of 3.
    • Red phantom shots now bounce 6 times instead of 8.
    • Now summons fewer Phantom Spirits.
    • Each phase now deals more contact damage.
    • Orbiting Phantoms now rotate slower.
    • Increased despawn timer by 5 seconds.
    • Fixed chains not drawing correctly when under high stress.
  • 1.2.2.007: Now has a despawn timer, which will force the boss to flee if it is enraged for too long.
  • 1.2.2.001:
    • Now cancels Rain if it is currently occurring.
    • No longer naturally spawns if it has been defeated prior or if no players are alive.
    • Nerfed hook contact damage from 250 / 350 Expert Mode / 437 Revengeance Mode to 200 / 280 Expert Mode / 350 Revengeance Mode.
    • Lowered hook speed.
  • 1.2.1.005:
    • Polterghast Hooks now use an immunity frame cooldown slot of 1 instead of the default 0.
    • Polterghast now uses the default immunity frame cooldown slot of 0, instead of 1.
  • 1.2.1.004: Nerfed health from 310,000 / 496,000 Expert Mode / 512,000 Revengeance Mode to 260,000 / 416,000 Expert Mode / 448,000 Revengeance Mode.
  • 1.2.1.003:
    • Nerfed health from 335,000 / 536,000 Expert Mode / 560,000 Revengeance Mode to 310,000 / 496,000 Expert Mode / 512,000 Revengeance Mode.
    • Phantom lasers now produce dust differently.
  • 1.2.1.002: Buffed base damage reduction from 40% to 45%, and damage reduction when below 50% health from 50% to 55%. Nerfed damage reduction below 25% health from 70% to 65%, and damage reduction when below 20% health in Revengeance Mode from 80% Revengeance Mode to 75% Revengeance Mode.
  • 1.2.1.001:
    • Nerfed health from 465,000 / 744,000 Expert Mode / 800,000 Revengeance Mode to 335,000 / 536,000 Expert Mode / 560,000 Revengeance Mode.
    • No longer has a DPS cap.
    • Tweaked specialized damage resistance formula.
    • Fixed it being unable to despawn properly.
  • 1.2.0.004:
    • Buffed base contact damage from 125 / 200 Expert Mode to 175 / 280 Expert Mode, and increased all health-based contact damage boosts.
    • Buffed Phantom laser damage from 204 / 320 Expert Mode to 240 / 400 Expert Mode.
    • Blue Phantom Shots now bounce 5 times instead of 3, and no longer decay in damage every time they bounce.
    • Red Phantom Shots now bounce 8 times instead of 5.
    • Phantom lasers now last longer and have more visible dust.
    • Tweaked specialized damage resistance formula.
  • 1.2.0.002:
    • Buffed base contact damage from 100 / 160 Expert Mode to 125 / 200 Expert Mode, Necroghast's contact damage from 120 / 192 Expert Mode to 150 / 240 Expert Mode, and Necroplasm's contact damage from 220 / 352 Expert Mode to 250 / 400 Expert Mode.
    • Nerfed Necroplasm's defense from 600 to 400.
    • Buffed blue phantom shot damage from 100 / 200 Expert Mode to 110 / 220 Expert Mode, and blue phantom blast damage from 120 / 240 Expert Mode to 130 / 260 Expert Mode.
    • Buffed red phantom shot damage from 120 / 240 Expert Mode to 130 / 260 Expert Mode, and red phantom blast damage from 130 / 260 Expert Mode to 140 / 280 Expert Mode.
    • Buffed Polterghast Hook damage from 190 / 266 Expert Mode to 250 / 350 Expert Mode.
    • Buffed Phantom projectile damage from 124 / 200 Expert Mode to 204 / 320 Expert Mode.
    • Now takes up 50 NPC slots instead of 25.
    • Increased resistance to Ichor.
    • Added a Boss Checklist entry.
    • Fixed Polterghast Hooks not despawning correctly.