Astrum Deus

Type	Boss – Burrowing Enemy
Damage	100 / 160 / 192 / 200 / 240 (Contact); 90 / 152 / 176 / 188 / 264 (Astral Laser); 100 / 172 / 192 / 204 / 288 (Astral God Ray); 120 / 180 / 208 / 224 / 312 (Astral Mine)
Max Life	200,000 / 320,000 /; 384,000 / 480,000 / 576,000
Defense	20
DR	10%
KB Resist	100%
Inflicts debuff	Astral Infection 100% chance;
Debuff duration	1.67 seconds (Contact); 1.25 seconds (Astral Mine, Astral God Ray); 0.75 second (Astral Laser)
Debuff tooltip	Your flesh is melting off
Immune to

Type	Boss – Burrowing Enemy
Damage	120 / 240 / 268 / 280 / 360
Max Life	200,000 / 320,000 /; 384,000 / 480,000 / 576,000
Defense	35
DR	20%
KB Resist	100%
Inflicts debuff	Astral Infection 100% chance;
Debuff duration	3.33 seconds
Debuff tooltip	Your flesh is melting off
Immune to

Type	Boss – Burrowing Enemy
Environment	Astral Infection
Max Life	600,000 / 960,000 / 1,152,000 / 1,440,000 / 1,728,000 (total)
KB Resist	100%
Inflicts debuff	Extreme Gravity 100% chance;
Debuff duration	Infinite
Debuff tooltip	Your wing time is reduced by 25%, infinite flight is disabled
Cold	-
Water	-
Sickness	Resistant
Electricity	-
Heat	Vulnerable
Coins	1

Not to be confused with Astrum Aureus, a similarly-themed cyborg boss.

"...Revered as the God of the night sky. It is said to devour dying stars and birth new ones in turn."

Astrum Deus is a Hardmode boss that must be defeated in order to allow Astral Ore to be mined. It begins as a large worm, similar to The Destroyer, but splits later in the fight.

Spawn

Astrum Deus does not spawn on its own and can be summoned by using the Astral Beacon with a Titan Heart or Starcore in the inventory at night. Astrum Deus can be spawned even in early Hardmode with Titan Hearts, but the boss is intended to be fought after the Lunatic Cultist has been defeated. When successfully activated, two astral stars rise from the beacon and eventually combine to summon Astrum Deus. When first spawned, it has high defense and damage reduction for 10 seconds to prevent using AoE attacks to kill it instantly.

Segments

Astrum Deus Tail

Statistics

Type	Boss – Burrowing Enemy
Damage	80 / 128 / 160 / 168 / 192
Max Life	200,000 / 320,000 / 384,000 / 480,000 / 576,000
Defense	50
DR	30%
KB Resist	100%
Inflicts debuff	Astral Infection 100% chance
Debuff duration	1.25 seconds
Debuff tooltip	Your flesh is melting off
Immune to

Behavior

Astrum Deus behaves similarly to worms, burrowing through the ground and attempting to ram the player, with the additional ability to fire lasers at the player from its segments. As the fight progresses, however, it gains the ability to fly (similarly to Wyverns) and, after it reaches half health, splits into two smaller worms with the same abilities as the original. Once one of the smaller worms is killed, the other despawns and the fight ends. Astrum Deus has 51 / 61 / 71 / 81 segments before splitting, and each worm created from it splitting has 26 / 31 / 36 / 41 segments. All of its attacks inflict the Astral Infection debuff.

If Astrum Deus is alive when it becomes daytime, it will enrage, greatly increasing its movement speed.

Attacks

Astrum Deus burrows through the ground, attempting to ram the player when it approaches them from below.
- If the player is far enough from the ground, Astrum Deus will swim through the air to reach them.
- If Astrum Deus is far away from the player, it will gain a massive speed boost until it is close to them.
- Astrum Deus' speed increases as its life decreases.
Every 10 seconds, Astrum Deus fires lasers from its body in a stream starting from its head and ending at its tail.
- The rate at which these lasers are fired staggers as the fight progresses, causing the attack to last longer the longer the fight progresses. Given enough time, Astrum Deus will constantly fire lasers at the player.
When Astrum Deus reaches 80% life, every 15 seconds, it will alternate between burrowing like a worm and flying like a Wyvern.
- While Astrum Deus is flying, segments close to its tail will leave behind Astral Mines instead of firing lasers, which lingers in place for 15 seconds before exploding. The lower Astrum Deus' life is, the more segments will leave mines.
  - Below 70% HP, mines have a chance to turn red and explode into an X of lasers. The chance of mines exploding increases as the worm loses HP.
When Astrum Deus reaches 50% life, it will split into two smaller worms, which act the same as the original, with some differences:
- One worm starts off flying, while the other starts off burrowing. They both alternate between the two behaviors every 10 seconds. The one that is currently flying will be blue, and the one that is currently burrowing will be orange.
- Worms that are currently flying will only leave behind astral mines instead of firing lasers.
- The staggered fire rate of the lasers and mines for each worm is reset.
- One of the worms has a slightly shorter delay between its laser barrages.

In Expert Mode

Segment size increased.
Number of segments increased from 50 to 61 before splitting, and from 26 to 31 after splitting.
When a split worm is below 50% HP and in its red "grounded" mode, it starts replacing its attacks with faster, blue-and-orange helical lasers. The lower HP the worm is, the more attacks will be replaced.
Mines start to move towards the player below 30% HP.
Segments can fire independently from laser barrages after they take enough damage.
Before splitting, only the damaged segments noted above can leave behind mines.
Mines and laser barrages are fired every 4 seconds after it splits instead of 10.

In Revengeance Mode

Segment size increased again.
Number of segments increased from 61 to 71 before splitting, and from 31 to 36 after splitting.
Movement speed is increased.
Independently firing segments have an increased rate of fire.
All nearby players are inflicted with Extreme Gravity.

In Death Mode

Segment size increased again.
Number of segments increased from 71 to 81 before splitting, and from 36 to 41 after splitting.
Movement speed and rate of fire are further increased.
Can fly at any time before splitting, and only leaves mines instead of firing lasers while flying regardless of health.
When one split worm is killed, instead of dying, the other one will survive and become enraged. The enraged worm will become translucent, no longer changes color to signify behavior changes, and has access to all of its attacks at all times. Only the last worm killed will drop loot and count as a defeat.
- The enraged worm's body and tail segments have 25 defense and 15% DR, whereas its head has 12 defense and 7.5% DR.

On the For the worthy seed

Moves 15% faster.
Switches behaviors every 5 seconds.

Aftermath

Once defeated, Astral Ore will become mineable.
Astral Crates will contain Astral Ore, Astral Bars and Meld Blobs.
Astral Slimes will begin dropping Astral Ore.
Using Novae Slag or Celestial Remains in the Extractinator will have a chance of giving the player Astral Ore.

Resistances

All segments take reduced damage from most non-minion piercing projectiles. Each hit decreases the damage of the next hit by 12%, until the eighth hit onwards which deal 20% of original damage.
All segments also take:
- 75% damage from Resurrection Butterfly.
- 50% damage from true melee hits.
- 30% damage from Aurora Blazer and Stardust Dragon Staff.
- 25% damage from Plaguenades.

Notes

All of Astrum Deus' loot will spawn at the nearest segment with the exception of 5-15 of the Stardust and the Hearts, which will always spawn at the head.
Astrum Deus takes 99% less damage from all sources for the first 10 seconds after it spawns, and for the first 5 seconds after it enters Phase 2.
If Astrum Deus is killed before splitting into two, it will drop 5-15 stardust, some hearts and mana, but no weapons, accessories or Treasure Bag. It will not split after this, and the boss will need to be re-summoned. The player will not be able to mine Astral Ore.
Repeatedly killing Astrum Deus can be a good way to get Fallen Stars to use as ammo for weapons like the Starmada or Starfleet.

Tips

For more elaborate strategies on defeating Astrum Deus, including weapon and arena recommendations, see Guide:Astrum Deus strategies.

Try and keep moving, and don't stay in one spot. Avoid circling the boss as the astral orbs will make it too difficult to do so.
Be aware of the position of the mines as they can wall off the player, making it extremely difficult to break out and leaves the player as easy prey.
- During Phase 2, the trail of mines will be shorter, although there will be more trails left throughout the arena.
  - Having a large arena can make this much less of an issue.
Astrum Deus' abundance of projectiles can, especially on less powerful computers, cause large frame rate drops. This can be used to the player's advantage by turning frame skip off, giving them more time to process and dodge attacks.
Like several other bosses, Astrum Deus will not despawn no matter the distance the player travels from it. This means the Magic Mirror can be used to teleport to a more suitable spot to fight.
While Astrum Deus can be fought at the start of Hardmode, it is not recommended until the player has at least defeated the Lunatic Cultist, as its fast speed, high damage, and many projectiles can make the fight completely overwhelming.

Trivia

The Bestiary entry for Astrum Deus: "When a star begins to die, under normal circumstances, its power simply fades as it falls to the nearest celestial body. However, some dying stars bloat and fester before falling. Astrum Deus exists to consume these stars before the Astral Infection manifests in them, and it has been revered for its sacred duty since time immemorial."

Astrum Deus' theme is Pest of the Cosmos, which was composed by the artist DM DOKURO.
- If the Calamity Music add-on mod is disabled, Boss 3 will play instead.
"Astrum Deus" in Latin roughly translates to "The Star God".
Astrum Deus can be summoned as soon as Hardmode begins, as Titan Hearts and the Astral Beacon are always available.
If the Boss Checklist Mod is installed, its unique despawn message will be "The infected deity retreats to the heavens."

History

edit

These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.

2.0.3.008: Now takes 30% damage from Aurora Blazer.

2.0.3.007: Now takes 30% damage from Stardust Dragon Staff.

2.0.3.005:
- Decreased Astral Infection duration from the head from 4 seconds to 3.33, from the body from 2 seconds to 1.67, and from the tail from 1.5 seconds to 1.25.
- Decreased Astral Infection duration from lasers from 1 second to 0.75, from helix lasers from 1.5 seconds to 1.25, and from mines from 1.5 seconds to 1.25.
- Body segments are no longer immune to Kami Flu.
- Now forces net syncs, even if the net spam counter is too high.

2.0.3.003:
- Decreased Astral Infection duration from head from 8 seconds to 4, from body from 5 seconds to 2, and from tail from 3 seconds to 1.5.
- Decreased Astral Infection duration from lasers from 2 seconds to 1, from helix lasers from 3 seconds to 1.5, and from mines from 3 seconds to 1.5.
- Reduced potential lag during the fight.

2.0.3.002: Fixed it not spawning dust on death.

2.0.3.001:
- Added new projectile shoot sounds.
- Now displays the minimum remaining health to defeat it on the vanilla boss health bar.

2.0.2.002:
- Now fires helix lasers half as often while both worms are alive.
- Now properly displays vanilla debuff colors and Hunter Potion effects.

2.0.2.001:
- Now drops Super Healing Potions instead of Greater Healing Potions.
- Now drops 16-24 / 20-32 Meld Blobs.
- Changed Bestiary entry from "The fragments of the star god's corpse still hold some of their former power, and even after succumbing to a dark infection, then being torn apart by an upstart worm, they willfully seek to return to the stars." to "Revered as a God of the stars, it has been infected by the starborne illness. However, it has now been broken free from the infection's control and roams the stars once more, consuming dying stars and birthing them anew."

2.0.1.002:
- No longer has a global grenade resistance.
- Now drops 5-15 Greater Healing Potions instead of 8-14.

1.5.1.003: Now drops 1 .

1.5.1.001:
- No longer increases in fall speed while over 200 and 350 tiles away from the player.
- Now fires mines which split into four lasers diagonally when below 70% health.
- Now fires double helix lasers when below 50% health in Expert Mode.
- Now fires moving mines when below 30% health in Expert Mode.
- No longer immune to all debuffs. It is now immune to Confused, Pearl Aura, Poisoned, and Astral Infection.
- Buffed head damage reduction from 0% to 20%, but nerfed defense from 50 to 35.
- Buffed body damage reduction from 0% to 10%, but nerfed defense from 25 to 20.
- Buffed tail damage reduction from 0% to 30%, but nerfed defense from 75 to 50.
- Buffed size from 100% / 135% to 100% / 120% / 135% / 140% / 150% .
- Now vulnerable to heat debuffs, but resistant to sickness debuffs.
- The other worm now remains alive when one worm is killed while in Death Mode. Doing so causes the remaining boss to turn transparent, reduce in defense and damage reduction, and perform all attack types simultaneously.

1.5.0.001:
- Buffed health from 187,500 / 300,000 / 360,000 to 200,000 / 320,000 / 384,000 .
- Nerfed Boss Rush health from 4,900,000 / 7,840,000 to 650,000 / 1,040,000 .
- No longer immune to any debuffs except Confused, Pearl Aura, Astral Infection, Poisoned, and Kami Flu.
- No longer enrages if the player flips gravity.
- Summoning animation is now sped up by 100% when using Starcore.
- Astral Mine projectiles now use a circular hitbox.
- Reduced initial invulnerability time in the second phase from 10 seconds to 5.
- Second phase clone now has a distinct glowmask.
- Reactive damage reduction effectiveness is now increased by 100% before defeating Moon Lord.
- Now takes 50% damage Tenebreus Tides water blade projectiles.
- No longer takes 75% damage from Lazhar, Inferno Fork, Cosmic Rainbow, Plague Staff, Eidolon Staff, and Charged Blaster Cannon, and 25% damage from Stardust Dragon Staff's minion.
- Decreased Astral Infection duration from mine projectiles from 5 seconds to 3, and from laser projectiles from 3 seconds to 2.
- Decreased how much dust the mines create.
- Now drops 25 instead of 20 .
- Decreased Fallen Star drop amount from 80-150 / 100-180 to 25-40 / 30-50 . Increased Lunar Fragment drop amounts in Normal Mode from 12-20 to 16-24.
- Lunar Fragment drops are now compacted to stacks of 4, and Fallen Star drops are now compacted to stacks of 5.
- Fixed an exploit that allowed players to deal extreme amounts of damage using Yanmei's Knife.

1.4.5.006: Added several custom sounds, including during its spawning animation.

1.4.5.005: Now takes 50% damage from Grand Guardian's explosions instead of 20%.

1.4.5.004:
- All worms now accelerate much faster and have a higher top speed if the player is far away.
- Now enrages during the day.
- No longer takes reduced damage from Forbidden Sun's explosions.

1.4.5.003:
- Now gradually reaches max velocity as its health decreases in Death Mode.
- Buffed head damage from 120 / 240 / 264 / 278 to 120 / 240 / 268 / 280 .
- Changed body damage from 100 / 170 / 195 to 100 / 160 / 192 / 200 .
- Changed tail damage from 80 / 136 / 156 to 80 / 128 / 160 / 168 .
- Buffed laser damage from 90 / 152 / 174 / 188 to 90 / 152 / 176 / 188 .
- Buffed mine damage from 120 / 180 / 206 / 223 to 120 / 180 / 208 / 224 .
- Fixed a bug that caused it to become permanently invulnerable during Boss Rush and in Death Mode.
- Fixed a bug that caused it to despawn while the player was still alive in multiplayer.
- Fixed a bug that caused it to repeatedly split during phase 1 to phase 2 transition.

1.4.5.002:
- Reduced top speed in second phase in all difficulties.
- Fixed an oversight where Boss Checklist Mod's Boss Log listed an outdated summon method.
- Fixed a bug that caused it to become permanently invulnerable during Boss Rush.

1.4.5.001:
- Now summoned by using a Titan Heart or Starcore at the Astral Beacon.
- Boss fight has been completely overhauled. Fight starts out with one worm that splits into two at 50% health.
- Removed Astrum Deus Probes from the fight.
- Defeating one worm or the other in phase 2 ends the fight.
- Flight speed now increases dramatically as its health lowers.
- Now inflicts Extreme Gravity in Revengeance and Death Mode.

1.4.4.004:
- Slightly separated the worms from each other.
- Now drops 80-150 / 100-180 Fallen Stars.

1.4.4.002: Worms now take 10% damage from Aerial Bane instead of 20%.

1.4.4.001: Now has a glowmask.

1.4.3.002:
- Now takes 20% damage from The Empyrean instead of 30%.
- Now takes 50% damage from Eldritch Tome, Lazhar, Resurrection Butterfly, Tome of Fates, and bee projectiles.

1.4.3.001:
- Nerfed small worm head damage from 100 / 200 / 250 / 287 to 100 / 200 / 220 / 232 .
- Nerfed small worm body damage from 85 / 144 / 165 to 85 / 144 .
- Nerfed small worm tail damage from 70 / 119 / 136 to 70 / 119 .
- Nerfed main worm head damage from 120 / 240 / 300 / 345 to 120 / 240 / 264 / 278 .
- Nerfed main worm body damage from 100 / 170 / 195 to 100 / 170 .
- Nerfed main worm tail damage from 80 / 136 / 156 to 80 / 136 .
- Nerfed laser damage from 90 / 152 / 190 / 218 to 90 / 152 / 174 / 188 .
- Nerfed mine damage from 120 / 180 / 225 / 258 to 120 / 180 / 206 / 223 .
- Increased vertical speed for the last worm alive.
- Now takes 30% damage from Plaguenade's main grenade.
- Death Mode changes:
  - Fires projectiles at the highest rate immediately, instead of increasing rate at 65% and 30% health.
  - Moves and turns at the highest speed immediately, instead of gradually speeding up as health lowers.
  - Decreased maximum movement and turning speed.
- Resprited map icon.

1.4.2.107: Fixed its Scorpio immunity not functioning properly.

1.4.2.106:
- Small worm stat changes:
  - Changed head damage from 105 / 168 to 100 / 200 , and nerfed defense from 30 to 20.
  - Nerfed body damage from 90 to 85, and defense from 45 to 40.
  - Buffed tail damage from 112 to 119 .
- Spectral worm stat changes:
  - Changed head damage from 130 / 208 to 120 / 240 , and nerfed defense from 40 to 25.
  - Buffed body damage from 160 to 170 , laser damage from 140 to 152 , and nerfed defense from 60 to 50.
  - Buffed tail damage from 75 / 120 to 80 / 136 , and nerfed defense from 80 to 75.
- Overhauled movement behavior to be smoother and more deadly.
- Smaller worms are slower and do not fire lasers from their bodies.
- Adjusted the way it gains speed at lower health.
- Lasers now last 4 seconds instead of 3.
- Mines now last 17 seconds instead of 20.
- Fixed mines damaging the player before becoming stationary.

1.4.2.105:
- Reduced speed of the spectral worm when it is alone.
- Lasers now pierce through the player.
- Mines fade in faster, but have a smaller explosion.
- Can no longer drop Astral Bulwark in Normal Mode.
- Tweaked various resistances:
  - No longer resists explosive Cranium Smashers and Plaguenade's bees.
  - Now takes 30% damage from The Empyrean instead of 20%.
  - Briny Baron's water spouts are now exempt from its piercing resistance.
  - Now takes 20% damage from Malachite's alt fire.

1.4.2.104:
- Head segments for both the small and spectral worms now inflict Astral Infection for 4 seconds instead of God Slayer Inferno for 3 seconds.
- Body segments for both the small and spectral worms now inflict Astral Infection for 3 seconds instead of God Slayer Inferno for 2 seconds.
- Tail segments for both the small and spectral worms now inflict Astral Infection for 2 seconds instead of God Slayer Inferno for 1.5 seconds.
- Lasers now inflict Astral Infection for 3 seconds instead of God Slayer Inferno for 2 seconds.
- Mines now inflict Astral Infection for 5 seconds instead of God Slayer Inferno for 4 seconds.

1.4.2.103:
- Increased the amount of celestial fragments dropped from 6-11 / 6-12 to 12-20 / 20-32 , and reworked movement.
- Lasers now have afterimages.

1.4.2.102:
- Buffed spectral worm's health from 25,000 / 40,000 / 57,360 / 86,000 to 37,500 / 60,000 / 86,080 / 129,120 , head damage from 110 / 176 to 130 / 208 , body damage from 80 / 128 to 100 / 160 , and tail damage from 55 / 88 to 75 / 120 .
- Buffed smaller worms' healths from 8000 / 12,800 / 19,200 / 31,040 to 12,000 / 19,200 / 28,800 / 46,560 , head damage from 85 / 136 to 105 / 168 , body damage from 70 / 112 to 90 / 144 , and tail damage from 50 / 80 to 70 / 112 .
- Buffed laser damage from 74 / 124 to 90 / 140 .
- Spectral worm and smaller worms now swap vulnerability and invulnerability based on the spectral worm's health and the total health of the smaller worms. Smaller worms become transparent and deal no contact damage while the main worm is vulnerable.
- Now resists a variety of different specific projectiles instead of taking 20% damage from all non-minion piercing projectiles.
- Now despawns quicker, and will travel upwards instead of downwards.
- Now drops a spread of various celestial fragments.
- No longer drops Starlight Fuel Cell, Nebulash, and Hallowed Key.

1.4.2.101:
- Mines now don't hurt the player for 1.67 seconds upon spawning, and they now pierce through players.
- Body segments now take 66% damage from Atlantis and Terra Flameburster.

1.4.2.004: Slightly decreased the smaller worms' speeds.

1.4.2.003:
- Now enrages if gravity is flipped.
- Now despawns slower.
- Now despawns at daytime, and is no longer able to despawn due to distance from the player.

1.4.2.002: Fixed an error where the internal value for it wasn't resetting.

1.4.2.001:
- Nerfed main worm's Boss Rush health from 2,500,000 / 4,000,000 / 4,800,000 to 1,300,000 / 2,080,000 / 2,400,000 .
- Nerfed small worm Boss Rush health from 720,000 / 1,152,000 / 1,344,000 to 360,000 / 576,000 / 672,000 .
- Main worm now has after images.
- Increased minimum vertical range from the player before gaining flight.
- Body and tail segments for both the main and small worms can no longer be lifestealed off of.
- Projectiles now have more descriptive names.
- Hallowed Key now drops from the Treasure Bag instead of directly from the boss in Expert Mode.

1.4.1.003: Decreased minimum coin drop amount from 30 to 20 .

1.4.1.002: Small worms no longer have increased fire rate based on how much health the player has left.

1.4.1.001:
- Buffed large worm's Boss Rush health from 1,900,000 / 3,040,000 / 4,000,000 to 2,500,000 / 4,000,000 / 4,800,000 .
- Buffed small worms' Boss Rush healths from 610,000 / 976,000 / 1,184,000 to 720,000 / 1,152,000 / 1,344,000 .
- Buffed Boss Rush damage modifier from 2.5x to 2.75x.
- All segments no longer take 50% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.
- Increased God Slayer Inferno duration from head segment contact from 2.5 seconds to 3.
- Decreased God Slayer Inferno duration from body segment contact from 2.5 seconds to 2.
- Decreased God Slayer Inferno duration from tail segment contact from 2.5 seconds to 1.5.
- Increased God Slayer Inferno duration from lasers from 1 second to 2.
- Increased God Slayer Inferno duration from mines from 2 seconds to 4.
- All segments now inflict God Slayer Inferno on contact at all times instead of only after being defeated prior.

1.4.0.001:
- Buffed main worm's health from 25,000 / 40,000 / 54,000 / 82,000 to 25,000 / 40,000 / 57,360 / 86,000 .
- Buffed smaller worm health from 8000 / 12,800 / 17,280 / 26,240 to 8000 / 12,800 / 19,200 / 26,240 .
- Nerfed main worm's head damage reduction from 15% to 10%, body damage reduction from 25% to 10%, and tail damage reduction from 50% to 35%.
- Body segments of both the small worms and large one now take 30% damage when below 33% health instead of 50%.
- The body segments of both the small and large worms no longer force projectiles to pierce once when below 33% health.
- Now drops Stardust.
- Resprited it, map icon and mines.

1.3.4.001:
- Nerfed spectral worm health from 40,000 / 64,000 / 80,000 / 128,000 to 25,000 / 40,000 / 54,000 / 82,000 .
- Nerfed small worm health from 11,000 / 17,600 / 20,800 / 41,600 to 8000 / 12,800 / 17,280 / 26,240 .
- Can now drop an Astrum Deus Trophy and its own lore item.
- Both the spectral worm and smaller worms now take 50% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.

1.3.3.001: Now removes the early-Hardmode nerf to enemy health and damage when defeated.

1.3.2.001:
- Main worm nerfs:
  - Nerfed head damage from 150 / 240 to 110 / 176 , and defense from 60 to 40.
  - Nerfed body damage from 95 / 152 to 80 / 128 , and defense from 75 to 60.
  - Nerfed tail damage from 70 / 112 to 55 / 88 , and defense from 90 to 80.
- Small worm nerfs:
  - Nerfed head damage from 100 / 160 to 85 / 136 , and defense from 60 to 30.
  - Nerfed body damage from 85 / 136 to 70 / 112 , and defense from 75 to 45.
  - Nerfed tail damage from 60 / 96 to 50 / 80 , and defense from 90 to 60.
- Nerfed laser damage from 94 / 140 / 147 / 210 to 74 / 124 / 130 / 186 .
- Throwing projectiles now deal 20% damage to the head and tail segments of both the main and small worms, and 50% damage to their body segments.

1.3.1.001: No longer inflicts Extreme Gravity in Revengeance Mode.

1.3.0.001: Now uses Pest of the Cosmos as its theme instead of Boss 3.

1.2.4.205: Now drop its respective Treasure Bag.

1.2.4.201:
- Increased spectral worm's speed.
- Decreased laser spread of small worms.
- The small worms no longer count as bosses.
- Now spawn Astrum Deus Probes at a 4% chance when hit if there are no more than 5 active.

1.2.4.101:
- Buffed large worm's health in Death Mode from 112,000 to 128,000 .
- Buffed small worms' health in Death Mode from 28,800 to 41,600 .
- The fight now has a limit of 3 flying Astrum Deus Probes at a time instead of 5.
- Now drops 1 Starlight Fuel Cell in Revengeance Mode.

1.2.4.002: Fixed a multiplayer desync bug.

1.2.4.001:
- The fight now includes a larger "spectral" worm which is invincible and cannot hurt the player until all of the small worms have been defeated. This worm does not inherit the Astrum Deus Probe ring.
- Nerfed small worm health from 18,500 / 29,600 / 32,000 / 40,000 to 11,000 / 17,600 / 20,800 / 28,800 .
- Decreased small worm length from 8 to 6.
- Small worms no longer drop Coins and Lesser Healing Potions.
- Astrum Deus Probes now fire mines half as often.
- Mines now last 20 seconds instead of 10.
- Now inflicts the Extreme Gravity debuff for the entire fight.
- Increased velocity on mines.
- Can now drop an Astrum Deus Mask.
- Resprited.
- Resprited mines.

1.2.3.008:
- Buffed laser damage from 66 / 108 / 135 / 162 to 94 / 140 / 175 / 210 .
- Mines now last shorter.

1.2.3.005: Worms are now much faster, shoot more lasers, and have faster lasers in Death Mode.

1.2.3.002:
- Each worm now gets 40,000 health in Death Mode.
- Increased speed in Death Mode.

1.2.2.005: Mines now last shorter, and inflict God Slayer Inferno for 2 seconds instead of 5.

1.2.2.001:
- Can now drop Nebulash and Starfall.
- Mines now last 15 seconds instead of 20.

1.2.1.004:
- Overhauled the battle; no longer one long worm, instead the battle takes place against a swarm of nine smaller worms.
- Reduced worm segment length from 52 to 8. Nerfed health of each worm from 150,000 / 240,000 / 264,000 to 18,500 / 29,600 / 32,000 .
- Nerfed head damage from 120 / 300 to 100 / 160 , and body damage from 95 / 152 to 85 / 136 .
- Nerfed mine duration from 50 seconds to 20.
- A total of 5 Astrum Deus Probes can be active at a time instead of 6.
- Body segments now take 66% damage and kill piercing when below 33% health instead of 50%.

1.2.1.002:
- Body segments now take 66% damage from projectiles when below 50% health, and causes all projectiles except for minions to pierce a maximum of 1 time.
- Body segments now take 50% damage from Bee Cloak, Holy Arrow, Star Cloak, and Star Veil's stars instead of 33%.

1.2.1.001:
- Buffed head damage from 110 / 330 to 120 / 360 .
- Buffed body damage from 75 / 120 to 95 / 152 .
- Now uses its own laser projectiles instead of The Devourer of Gods' Nebula Shots.
- Increased laser spread.
- Now has a limit of 6 free Astrum Deus Probes instead of 3.
- Can now drop Hallowed Key.

1.2.0.002: Body segments no longer fire more lasers if the player has high stress.

1.2.0.001:
- Now gets 264,000 health in Revengeance Mode.
- Now has 15% damage reduction on the head, 25% damage reduction on the body, and 50% damage reduction on the tail.
- Nerfed laser damage from 80 / 136 to 66 / 108 .
- Increased speed.
- Body segments now cut the damage of infinitely piercing projectiles by 50% instead of 80%.
- Now has a 2% chance to drop Laudanum or Stress Pills in Revengeance Mode.

1.1.7.971:
- Buffed laser damage from 50 / 84 to 80 / 136 .
- Increased health-based defense scaling.
- Now starts shooting lasers more frequently once it reaches 65% and 30% health, in addition to its other health-based laser frequency increases.
- Halved the laser frequency boost it gains at 40% health.
- Body segments now take 33% damage from Bee Cloak, Holy Arrow, Star Cloak, and Star Veil's stars.

1.1.7.951:
- Now shoots lasers faster if the player's health is lower.
- Body and tail segments now internally count as bosses.

1.1.7.911: Resprited map icon.

1.1.7.901: Introduced.

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