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TypeFlying Enemy
Damage0 (contact)
This attack will cause defense damage on hit. 80 / 120 Expert Mode / 150 Revengeance Mode / 180 Death Mode (lightning orb and bolts)
This attack will cause defense damage on hit. 80 / 120 Expert Mode / 150 Revengeance Mode / 180 Death Mode (ice chunk and spikes)
Max Life10,000
KB Resist100%
Inflicts debuffElectrifiedElectrified
100% chance

Debuff duration2 seconds (Lightning)
Debuff tooltipMoving hurts!
Inflicts debuffChilledChilled
100% chance

Debuff duration3 seconds (Ice Mist)
Debuff tooltipYour movement speed has been reduced
Inflicts debuffFrozenFrozen
100% chance

Debuff duration1.5 seconds (Ice Mist)
Debuff tooltipYou can't move!
Immune toAll debuffs except:
EnragedShellfish ClapsSpite
BannerEidolist BannerEidolist Banner
Coins1 Gold Coin

The Eidolist is a Hardmode enemy that appears in the 3rd and 4th layers of the Abyss after defeating Wall of Flesh or Calamitas Clone and are also summoned by the Primordial Wyrm during its first four phases.

Eidolists will stay in one place until they are damaged, in which they will attempt to fly towards the player, going through blocks and teleporting periodically. Once provoked, they will release lightning orbs and ice balls that emit ice shards. Both attacks are very similar to those of the Lunatic Cultist.

The lightning inflicts the Electrified debuff for 2 seconds, and the ice ball and ice shards inflict Frozen for 1.5 seconds and Chilled for 3 seconds.


  • Eidolists do not deal contact damage which opens them up for more aggressive players who struggle to close distance without suffering heavy hits of damage.
    • For this reason, true melee weapons are extremely effective against this enemy.
  • Only one Eidolist can be alive at once.


  • The BestiaryBestiary entry for the Eidolist: "Once members of the dragon cult, they now beg the favor of a new master. They are able to live in the abyss indefinitely thanks to their wyrm-like form, allowing them to serve a new purpose."
  • Judging by their appearance and behavior, they seem to be a Cultist partially transformed into an Eidolon Wyrm.
  • The Eidolist still resembles an old sprite of the Eidolon Wyrm, which was heavily based off of the Ghost Leviathan from the aquatic exploration game, Subnautica.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Can now spawn after defeating Calamitas Clone.
    • Changed the words "Dragon Cult" in its bestiary entry to be lower case.
  • Greatly increased spawn rate in the Abyss, and can now also spawn in layer 4.
    • Now drops 8-10 / 10-14 Expert Mode Lumenyl at a 100% chance instead of 8-10 at a 100% chance with a 50% chance to drop an extra 2-4 in Expert Mode.
    • Now vulnerable to electricity and sickness debuffs, but resistant to water and heat debuffs.
  • Can no longer spawn in the Dungeon.
  • No longer gains a health boost in Death Mode.
  • Now drops Lunar Cultist Hood and Lunar Cultist Robe at a 10% chance instead of 100%.
    • Now has a unique death sound and no longer automatically aggros a player while a boss is alive.
    • Now forcibly classified as organic for the purposes of finite use weaponry.
  • Fixed an oversight where they dropped Ectoplasm before defeating Plantera.
  • Can no longer spawn in layer 4 of the Abyss.
  • Decreased minimum coin drop amount from 2 Gold Coin to 1 Gold Coin.
  • Can now drop Lumenyl and Ectoplasm after defeating Calamitas.
  • Buffed health from 5000 / 10,000 Expert Mode / 16,000 Death Mode to 10,000 / 20,000 Expert Mode / 26,000 Death Mode.
    • No longer deals contact damage.
    • No longer drops Eidolon Tablet if the Lunar Events are currently active.
    • Lightning Orbs no longer deal damage.
    • Can now spawn at the beginning of Hardmode instead of after defeating Plantera.
    • Can now drop Eidolon Tablet.
    • Decreased aggression.