History:Cryogen

Main article: Cryogen

• 2.0.3.007:
  • Ice blasts, ice bombs, and ice rain no longer make sounds on death.
  • Fixed Cryogen's Shield despawning due to distance.

• 2.0.3.002: Cryogen's Shield is now affected by the Boss Health Boost Percentage configuration option.

• 2.0.3.001:
  • Now displays a shield bar on the vanilla boss health bar when its Shield is active.
  • Now drops 8-10 / 10-12 Essences of Eleum instead of 4-8 / 5-9 .

• 2.0.2.002:
  • Changed Boss Checklist Mod despawn message from "Cryogen drifts away, carried on a freezing wind." to "Cryogen disappears amidst the biting winds of the blizzard."
  • It and Cryogen's Shield now properly display vanilla debuff colors and Hunter Potion effects.

• 2.0.2.001:
  • It and all of its projectiles now have a darker blue outline effect.
  • Added new sounds.

• 2.0.1.002: Now immune to Frostbite.

• 2.0.0.001:
  • Decreased how often it can spawn in Ice Bomb projectiles, and decreased how many spawn from 4 to 2.
  • Increased how many Ice Bomb shrapnel projectiles are spawned, and decreased how fast they travel.

• 1.5.1.003: Now drops 40 .

• 1.5.1.001:
  • Buffed health from 18,795 / 30,072 / 44,784 to 30,000 / 48,000 / 57,600 .
  • Buffed contact damage from 50 / 115 / 138 / 161 to 60 / 138 / 161 / 184 .
  • Buffed Cryogen's Shield damage from 50 / 100 / 120 / 134 to 60 / 120 / 138 / 158 .
  • Buffed Ice Blast damage from 46 / 80 / 96 / 108 to 52 / 92 / 112 / 124 .
  • Buffed Ice Bomb damage from 58 / 100 / 120 / 132 to 70 / 120 / 136 / 152 .
  • Buffed Ice Rain damage from 52 / 92 / 112 / 124 to 60 / 100 / 120 / 132 .
  • No longer spawns Aurora Spirits or Cryocores.
  • Halved the base velocity of Ice Bombs and reduced the initial Ice Shards count from 6 to 2 / 3 . The velocity increases after every phase and amount of Ice Shards increases by 1 every 2 phases. Slightly decreased the velocity of Ice Shards resulting from Ice Bombs in Expert Mode. Decreased the amount of Ice Bombs released from 4 to 3.
  • Phase 5 transition now occurs at 30% / 45% / 50% instead of 20% / 40% .
  • It and its Shield are now vulnerable to heat debuffs but resistant to cold and sickness debuffs.
  • Death Mode changes:
    • Transitions into Phase 2 immediately instead of 85%.
    • Transitions into Phase 3 at 80% health instead of 70%.
    • Transitions into Phase 4 at 60% health instead of 55%.
    • Transitions into Phase 5 at 50% health instead of 40%.
    • Transitions into Phase 6 at 35% health instead of 25%.
    • Transitions into Phase 7 at 25% health instead of 15%.
    • Reduced time to spawn Cryogen's Shield from 12 seconds to 9.
    • Decreased Cryogen's Shield size by 20% and health from 1400 to 700.
    • Cryogen's Shield bursts into 6 blasts instead of 4 when destroyed.
  • Now drops Soul of Cryogen regardless of world difficulty.
  • Increased Frozen Key drop rate from 20% to 33%, and it now drops directly from the boss.
  • Removed Ice Star from Cryogen's Boss Checklist loot list.

• 1.5.0.001:
  • Buffed health from 17,900 / 26,300 / 42,080 to 18,795 / 30,072 / 44,184 .
  • Nerfed Boss Rush health from 3,000,000 / 4,800,000 to 300,000 / 480,000 .
  • Nerfed phase 6 defense from 18 to 0.
  • No longer immune to any debuffs except Confused, Pearl Aura, Glacial State, and Exo Freeze.
  • Overall movement is now more fluid.
  • Projectiles now always follow a set pattern in all phases.
  • Ice Bomb placement has been adjusted to make it more fair.
  • It and its Shield now use a circular hitbox.
  • Increased its out of biome enrage velocity by 50%.
  • Now drops 10 instead of 12 .
  • No longer drops Frost Cores or Frigid Bars.
  • Ice Blasts and Bombs now create less dust.

• 1.4.5.006: Ice Bomb and Ice Blast projectiles are now more visible during the day.

• 1.4.5.004:
  • Can now always be seen during its last phase and its projectiles are now blue during the day.
  • Now enrages when outside of the Snow biome.
  • No longer transitions between phases 1-5 at different healths in each difficulty mode. Instead it transitions to phases 2, 3, 4 and 5 at 85%, 70%, 55% and 40% health respectively.
  • Updated the health thresholds for transitioning to final phase(s):
    • Phase 6 now begins at 15% / 20% / 25% / 30% health, instead of 15% / 27% / 40% .
    • Phase 7 now begins at 10% / 15% health, instead of 15% / 25% .
    • The first increase to rotation speed now happens at 5% / 7.5% health instead of 10% / 22.5% .
    • The second increase to rotation speed now happens at 2.5% / 5% / 30% health instead of 5% / 20% / 40% .

• 1.4.5.003:
  • No longer deals increased contact damage in its final phase.
  • Buffed contact damage from 50 / 90 / 112 / 128 to 50 / 115 / 138 / 161 .
  • Buffed Cryogen's Shield damage from 50 / 100 / 114 / 124 to 50 / 100 / 120 / 134 .
  • Buffed Ice Blast damage from 46 / 80 / 96 / 105 to 46 / 80 / 96 / 108 .
  • Buffed Ice Rain damage from 52 / 92 / 110 / 121 to 52 / 92 / 112 / 124 .

• 1.4.5.002:
  • No longer immune to the Life Drain debuff.
  • All projectiles now have glowmasks to make them more visible.

• 1.4.5.001:
  • Added an aurora effect above the player during the fight.
  • Reduced the amount of ice shards rained in phases 3 and 4 from 15 to 6 and 12 respectively.
  • Ice Bombs and Ice Blasts are now fired in evenly-spaced rings.
  • No longer immune to Shadowflame or War Cleave.

• 1.4.4.004: Now forces the rain to stop.

• 1.4.4.002: No longer drops Souls of Might.

• 1.4.4.001: Resprited.

• 1.4.3.002:
  • No longer rains down ice while above the player.
  • No longer drops Ice Stars.
  • Projectiles now emit light.
  • No longer immune to Astral Infection, Celled, Dryad's Bane, or Oiled.

• 1.4.3.001:
  • Nerfed contact damage from 50 / 90 / 112 / 129 to 50 / 90 / 103 / 111 .
  • Nerfed final phase contact damage from 75 / 135 / 168 / 194 to 75 / 135 / 155 / 167 .
  • Nerfed Cryogen's Shield damage from 50 / 100 / 125 / 143 to 50 / 100 / 114 / 124 .
  • Nerfed Ice Blast damage from 46 / 80 / 100 / 114 to 46 / 80 / 96 / 105 .
  • Nerfed Ice Bomb damage from 100 / 125 / 143 to 100 / 120 / 132 .
  • Nerfed Ice Rain damage from 52 / 92 / 115 / 132 to 52 / 92 / 110 / 121 .
  • No longer immune to Betsy's Curse.
  • Added a new phase in Revengeance Mode at 15% / 25% health where it alternates between a chain of charges, spawning ice bombs, and raining ice shards.
  • Cryogen now rotates in Phase 2 and 4.
  • Increased the spread of Phase 3 ice rain attack by 1.8x and decreased its gravity by 1.5x.
  • Increased the spread of Phase 4 ice rain attack by 3.6x and increased its gravity by 4x.
  • Increased Ice Bomb's lifespan from 3 seconds to 5.
  • Ice shards from Ice Bombs no longer have increased gravity.
  • Death Mode changes:
    • Transitions into Phase 2 immediately instead of below 93%.
    • Transitions into Phase 3 below 80% health instead of 76%.
    • Transitions into Phase 4 below 70% health instead of 59%.
    • Transitions into Phase 5 below 55% health instead of 42%.
    • Transitions into Phase 6 below 40% health instead of 25%.
    • Decreased Ice Bomb spawn frequency for the first 6 phases.

• 1.4.2.106:
  • Buffed Boss Rush health from 2,700,000 / 4,320,000 / 4,800,000 to 3,000,000 / 4,800,000 / 5,120,000 .
  • Nerfed contact damage from 60 / 96 to 50 / 90 , and buffed defense from 10 to 12.
  • Buffed Ice Bomb damage from 44 / 88 to 50 / 100 , and made them slower.
  • Buffed Cryogen's Shield damage from 25 / 50 to 50 / 100 .
  • Now has an indicator for where it is going to teleport.
  • Now teleports quicker.
  • Decreased how many ice shards are created during Ice Rain attack.
  • Fixed Cryogen's Shield gores spawning in the wrong place.

• 1.4.2.105:
  • Can no longer teleport on top of the player, and can now be damaged at all times, but can also damage the player at all times.
  • Teleportation now happens at a set time interval instead of having a variable of randomness.
  • Now fades in and out during teleportation faster.
  • Teleport is now accompanied by a sound.

• 1.4.2.104: Increased speed in phases 3 and 5.

• 1.4.2.103: Increased overall speed.

• 1.4.2.101:
  • Cryogen's Shield can now only hit the player while fully visible.
  • Fixed it latching onto the player and stun locking them.

• 1.4.2.001:
  • Nerfed Boss Rush health from 5,400,000 / 8,640,000 / 9,600,000 to 2,700,000 / 4,320,000 / 4,800,000 .
  • Nerfed Cryogen's Shield Boss Rush health from 200,000 to 100,000.
  • Projectiles now have more descriptive names.
  • Increased Essence of Eleum drop count from 3-5 / 4-5 to 4-9 / 5-9 .

• 1.4.1.003: Increased minimum coin drop amount from 10 to 12 .

• 1.4.1.001:
  • Buffed Boss Rush health from 4,200,000 / 6,720,000 / 7,840,000 to 5,400,000 / 8,640,000 / 9,600,000 .
  • Buffed Cryogen's Shield's Boss Rush health from 170,000 / 340,000 to 200,000 / 400,000 .
  • Buffed Boss Rush damage modifier from 3x to 4x.
  • No longer regenerates its Shield during phases 4 and 5.
  • No longer takes 50% damage from Crystal Bullet shards and Holy Arrow stars.
  • Now spawns the Archmage when defeated if he isn't currently present.
  • Now guaranteed to inflict Frostburn on contact, and also inflicts Chilled now.
  • Increased Frozen's duration from Ice Blasts from 1 second to 1.5.
  • Ice Blasts, Ice Rains, and Ice Bombs now inflict Frostburn and Chilled.
  • Ice Rain no longer inflicts Frozen.
  • Cryogen's Shield now inflicts Frostburn and Chilled on contact.

• 1.4.0.001:
  • Buffed health from 17,900 / 28,640 / 38,880 / 59,040 to 17,900 / 28,640 / 42,080 / 63,840 .
  • Nerfed damage reduction from 15% to 10%, and Cryogen's Shield damage reduction from 60% to 40%.
  • Now shoots Ice Bombs less often.
  • Resprited Ice Blasts.

• 1.3.4.103:
  • Sprite now changes in final phase.
  • Resprited it and its Shield, gores, and map icon.

• 1.3.4.101:
  • Buffed health from 17,900 / 28,640 / 32,400 / 49,200 to 17,900 / 28,640 / 38,880 / 59,040 .
  • Nerfed damage reduction from 35% to 15%.

• 1.3.4.001:
  • Nerfed health from 22,500 / 36,000 / 40,000 / 88,000 to 17,900 / 28,640 / 32,400 / 49,200 .
  • Nerfed Cryogen's Shield health from 2000 to 1200.
  • No longer becomes invincible when outside the Snow biome.
  • Increased aggressiveness when outside the Snow biome.
  • Now takes 50% damage from Crystal Bullet shards, Holy Arrow stars, split Terra Arrows, and split Terra Bullets.
  • Fixed it not enraging when out of the Snow biome in Death Mode.

• 1.3.3.001:
  • Now drops 20-41 / 25-41 Souls of Might.
  • Now removes the early-Hardmode nerf to enemy health and damage when defeated.
  • Cryogen's Shield is now affected by the early Hardmode health and damage nerfs.

• 1.3.2.001:
  • Nerfed ice blast damage from 70 / 100 / 105 / 150 to 46 / 80 / 84 / 120 .
  • Nerfed ice rain damage from 64 / 128 / 134 / 192 to 52 / 92 / 96 / 138 .
  • No longer immune to Abyssal Flames, Armor Crunch, Brimstone Flames, Cursed Inferno, Daybroken, Demon Flames, God Slayer Inferno, Holy Flames, Marked for Death, Nightwither, On Fire!, Plague, Shred, or Whispering Death.
  • Now spawns Cryonic Ore when defeated.

• 1.3.1.001: Now fades in and out quicker.

• 1.3.0.001:
  • It and its Shield now have gores.
  • Can no longer be homed in on while teleporting.
  • No longer regenerates its Shield in phase 5.

• 1.2.4.201:
  • Buffed contact damage from 50 / 80 to 60 / 96 .
  • Now has 10 defense.
  • Can no longer fire projectiles unless fully opaque.
  • Now teleports more slowly.
  • Now shoots ice blasts more often.
  • No longer gains additional damage and defense based on its remaining health.
  • Fixed contact damage going to Normal Mode values after teleporting in Expert Mode.

• 1.2.4.101: Buffed health in Death Mode from 44,800 to 88,000 .

• 1.2.4.002:
  • Buffed health from 13,500 / 21,600 / 24,000 / 32,000 to 22,500 / 36,000 / 40,000 / 44,800 .
  • Buffed Cryogen's Shield health from 500 / 600 to 2000 / 2000 .
  • Replaced phase 5 where it spins in place while firing frost bolt barrages, ice shards, and star-shaped frost bolt patterns, while also summoning Cryocores and Aurora Spirits. Now teleports near the player from time to time while continuing its other attacks.
  • Cryogen's Shield now fires extra ice blasts.
  • Reduced dust idly spawned from both Cryogen's Shield and Cryogen itself.

• 1.2.4.001: Cryo Stone, Frost Flare, and Frozen Key now drop from the Treasure Bag instead of directly from the boss in Expert Mode.

• 1.2.3.004: Phases now happen earlier in Death Mode.

• 1.2.3.002:
  • Now gets 32,000 health in Death Mode.
  • Now shoots more often in Death Mode.

• 1.2.3.001:
  • Increased projectile speed.
  • Now has a smaller chance of summoning minions.

• 1.2.1.007:
  • Stats:
    • Buffed health from 12,500 / 20,000 / 22,400 to 13,500 / 21,600 / 24,000 .
    • Nerfed contact damage from 65 / 104 / 130 to 50 / 80 / 100 .
    • Buffed ice bomb damage from 44 / 88 / 125 to 50 / 100 / 125 .
    • Buffed phase 5's ice blast damage from 60 / 92 / 115 to 70 / 100 / 125 .
    • Nerfed Cryogen's Shield's damage from 30 / 60 / 75 to 25 / 50 / 62 .
  • AI:
    • Transitions into its phases at higher percentages of health. From 74%, 52%, 35%, and 10% to 83%, 66%, 49%, and 15%.
    • Now creates ice bombs half as often.
    • Now spawns 8-11 minions per 17% health lost instead of 1-3 per 2% health lost.
    • Lowered chance to shoot ice blasts in phase 3.
    • Phase 4 now exclusively uses its ice shard spread attack instead of exclusively using its ice blast shotgun attack.
    • Phase 4 will now attempt to hover above the player and rain ice shards down on them.
    • Phase 5 can no longer use its ice blast shotgun attack.
    • Phase 6 can no longer use any projectile attacks.

• 1.2.1.004:
  • Nerfed health from 14,000 / 22,400 / 25,600 to 12,500 / 20,000 / 22,400 .
  • Buffed base Ice Bomb damage from 40 / 80 / 92 to 44 / 88 / 100 .
  • Buffed base Ice Blast damage from 44 / 72 to 52 / 80 .
  • Buffed base Ice Rain damage from 60 / 120 to 64 / 128 .
  • Decreased speed.

• 1.2.1.001:
  • Buffed Ice Blast damage from 48 / 80 to 56 / 88 .
  • Buffed Ice Rain damage from 36 / 60 to 44 / 68 .
  • Can now drop Frozen Key.
  • Fixed it being unable to despawn properly.

• 1.2.0.004:
  • Buffed damage reduction from 20% to 33%.
  • Buffed Cryogen's Shield damage reduction from 50% to 60%.

• 1.2.0.001:
  • Now gets 25,600 health in Revengeance Mode.
  • Nerfed health from 22,000 / 35,200 to 14,000 / 22,400 , buffed contact damage from 60 / 96 to 65 / 104 , and nerfed defense from 5 to 0.
  • Nerfed Cryogen's Shield's health from 1000 / 1400 to 500 / 600 , and defense from 5 to 0.
  • Nerfed ice bomb damage from 60 / 120 to 40 / 80 / 92 .
  • Nerfed base ice blast damage from 50 / 88 to 44 / 72 .
  • Nerfed base ice rain damage from 58 / 100 to 48 / 80 .
  • Now has 20% damage reduction.
  • Cryogen's Shield now has 50% damage reduction.
  • Lowered ice blast and ice rain's chances to inflict Frozen from 10% to 5%.
  • Increased the time it takes to despawn.
  • Reduced Frostburn duration from contact from 5 seconds to 1.67.
  • No longer immune to Ichor.
  • Now has a 2% chance to drop Laudanum or Stress Pills in Revengeance Mode.

• 1.1.7.949: Now uses custom projectiles instead of reusing vanilla ones.

• 1.1.7.913: Reimplemented final phase status message.

• 1.1.7.901:
  • Changed health from 26,500 / 29,150 to 22,000 / 35,200 and buffed contact damage from 40 / 44 to 60 / 96 .
  • Nerfed Cryogen's Shield's health from 1500 to 1000 / 1400 , damage from 80 / 100 to 30 / 60 , and defense from 10 to 5.
  • Buffed Frost Blast damage from 50 / 88 to 60 / 104 and increased their spread.
  • Nerfed Ice Shard damage from 70 / 140 to 60 / 120 .
  • Buffed Ice Bomb damage from 46 / 92 to 60 / 120 .
  • Increased speed when below 74% health.
  • Decreased Expert Mode health-based damage and defense scaling.
  • Increased Cryogen Expert Mode chance to inflict Frostburn on contact from 25% to 33% .
  • Increased Cryo Bar drop count from 15-24 / 20-39 to 15-25 / 20-40 .
  • Can now drop Bittercold Staff, Effluvium Bow, Glacial Crusher, Ice Stars, Icebreaker, Permafrost, and Snowstorm Staff in Normal Mode.
  • Increased Ice Star drop count from 50-99 to 150-200 .
  • Increased the chances for all weapons to drop.
  • Can no longer naturally spawn.
  • Removed all health-based status messages.
  • Fixed the Treasure Bag being unable to drop Permafrost.

• 1.1.7.859: Changed 10% health message from "Cryogen's core is all that remains!" to "Cryogen is derping out!".

• 1.1.7.804: Now uses vanilla enemy spawn chance instead of custom one.

• 1.1.7.801:
  • Nerfed health from 31,800 to 29,150 .
  • Buffed base contact damage from 35 / 42 to 40 / 44 .
  • Nerfed base Ice Bomb damage from 56 / 112 to 46 / 92 , base Frost Blast damage from 100 / 112 to 44 / 76 , and base Frost Shard damage from 80 / 160 to 70 / 140 .
  • Now drops 10 in Normal Mode.

• 1.1.7.701: Now becomes invincible instead of despawning if the player leaves the Snow biome.

• 1.1.7.56:
  • Now takes up 7 NPC slots instead of 5.
  • Now despawns if brought out of the Snow biome for too long.
  • Now uses Antarctic Reinforcement as its theme instead of the Frost Moon theme.

• 1.1.7.55:
  • Introduced Cryogen's Shield.
  • Nerfed base contact damage from 70 / 84 to 35 / 42 , and base defense from 25 to 5.
  • Phase 1 no longer teleports in a similar style to Brain of Cthulhu.
  • Increased the distance at which phase 2 hovers above the player.
  • Defense and contact damage now only scale with its health in Expert Mode and higher instead of all difficulty modes.
  • Increased the frequency at which Ice Bombs are fired in phase 1.
  • Now has a Shield which surrounds the core while spinning, which can be killed, but comes back after a short period of time.
  • No longer spins due to the separation of the shield from the core.
  • No longer gets smaller after each phase.
  • Rain now starts at the beginning of the fight instead of after phase 1.
  • Now immune to all debuffs.
  • All phases are now counted as one NPC instead of each phase counting as its own NPC.

• 1.1.7.53: Decreased the speeds of second, third, and fourth phases.

• 1.1.7.5: No longer spawns if the player is near a Celestial Pillar.

• 1.1.7:
  • Nerfed phase 1's contact damage from 80 / 96 to 70 / 84 .
  • Nerfed phase 2's contact damage from 90 / 108 to 80 / 96 .
  • Nerfed phase 3 and 4's contact damages from 95 / 114 to 85 / 102 .
  • Nerfed phase 5 and 6's contact damages from 100 / 120 to 90 / 108 .
  • Nerfed Ice Bomb damage from 100 to 56.
  • Now drops 3-5 / 4-5 Essences of Eleum instead of 2-4 / 3-5 .
  • Projectiles no longer gain extra damage after defeating Moon Lord.
  • No longer gains speed in Prepare to Die Mode.
  • Now spawns 25x less frequently.

• 1.1.6.17:
  • Now immune to Armor Crunch.
  • Fixed it despawning incorrectly.

• 1.1.6.15:
  • All phases now produce less dust when hit.
  • All phases now produce dust when killed.

• 1.1.6.1: Resprited map icon.

• 1.1.5.095: Resprited Ice Bombs.

• 1.1.5.0948: Resprited.

• 1.1.5.094: Can now drop a Cryogen Trophy.

• 1.1.5.091:
  • Projectiles now last shorter.
  • Can now drop a Cryogen Mask.

• 1.1.5.071: Fixed a typo in one of the status messages saying "loosing" instead of "losing".

• 1.1.5.06:
  • Decreased chance to inflict Frostburn from 100% to 20% / 25% .
  • Decreased phase 2's damage.

• 1.1.5: Introduced.