Adult Eidolon Wyrm

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For the mini boss, see Eidolon Wyrm.

The Adult Eidolon Wyrm is a Superboss battled in the 4th layer of the Abyss. While it can be summoned at any time, it is intended to be fought after both the Exo Mechs and Supreme Calamitas have been defeated.

Its only unique drop is the Halibut Cannon, a powerful endgame gun.

Spawn

The Adult Eidolon Wyrm does not spawn on its own and will spawn at any time if a player is affected with the Chaos State debuff (given by Rod of Discord, Normality Relocator, and similar items) while in any layer of the Abyss.

Segments

Adult Eidolon Wyrm Head
Adult Eidolon Wyrm Head.png
Statistics
TypeSuperbossBurrowing Enemy
EnvironmentAbyss
DamageThis attack will cause defense damage on hit. 400 / 800 Expert Mode / 850 Revengeance Mode / 880 Death Mode / 1000 Master Mode (Contact)
This attack will cause defense damage on hit. 500 / 752 Expert Mode / 788 Revengeance Mode / 808 Death Mode / 1182 Master Mode (Lightning)
This attack will cause defense damage on hit. 400 / 600 Expert Mode / 632 Revengeance Mode / 648 Death Mode / 948 Master Mode (Ice Mist)
400 / 600 Expert Mode / 632 Revengeance Mode / 648 Death Mode / 948 Master Mode (Ancient Doom)
Max Life2,415,000 / 3,864,000 Expert Mode / 4,636,800 Revengeance Mode / 5,796,000 Master Mode / 6,955,200 Revengeance Mode Master Mode
Defense100
DR40%
KB Resist100%
Adult Eidolon Wyrm Body
Adult Eidolon Wyrm Body.png
Statistics
TypeSuperbossBurrowing Enemy
EnvironmentAbyss
Damage0 (Contact)
This attack will cause defense damage on hit. 360 / 540 Expert Mode / 630 Revengeance Mode / 675 Death Mode / 810 Master Mode (Ancient Light)
Max Life2,415,000 / 3,864,000 Expert Mode / 4,636,800 Revengeance Mode / 5,796,000 Master Mode / 6,955,200 Revengeance Mode Master Mode
Defense0
DR0%
KB Resist100%
Inflicts debuffHoly FlamesHoly Flames
100% chance
Debuff duration3 seconds (Ancient Light)
Debuff tooltipDissolving from holy light
Adult Eidolon Wyrm BodyAlternate
Adult Eidolon Wyrm Body (alternate).png
Statistics
TypeSuperbossBurrowing Enemy
EnvironmentAbyss
Damage0 (Contact)
400 / 600 Expert Mode / 632 Revengeance Mode / 648 Death Mode / 948 Master Mode (Shadow Fireball)
Max Life2,415,000 / 3,864,000 Expert Mode / 4,636,800 Revengeance Mode / 5,796,000 Master Mode / 6,955,200 Revengeance Mode Master Mode
Defense0
DR0%
KB Resist100%
Inflicts debuffShadowflameShadowflame
100% chance
Debuff duration2 seconds (Ancient Doom)
Debuff tooltipLosing life
Adult Eidolon Wyrm Tail
Adult Eidolon Wyrm Tail.png
Statistics
TypeSuperbossBurrowing Enemy
EnvironmentAbyss
Damage0
Max Life2,415,000 / 3,864,000 Expert Mode / 4,636,800 Revengeance Mode / 5,796,000 Master Mode / 6,955,200 Revengeance Mode Master Mode
Defense0
DR0%
KB Resist100%

Behavior

The Adult Eidolon Wyrm is an aerial worm-like enemy with 42 segments in total. Its body and tail segments can neither take damage nor deal contact damage. It performs a variety of attacks on a cycle that changes slightly with each phase transition, quickly chasing players and attempting to ram them while not using any attacks. When transitioning between phases, the wyrm will choose the next attack in its next phase's cycle. Upon contact with the head, the player is inflicted with the Crush Depth debuff for 10 seconds.

While it can be spawned in any layer of the Abyss, it will enrage outside of the 4th layer. When enraged, the wyrm moves and spins faster, lightning bolts and Ice MistIce Mists are more predictive, 1 extra EidolistEidolist and 2 extra Ancient DoomAncient Dooms are summoned in their respective attacks, and it gains the ability to use a telekinetic push attack similar to the regular Eidolon Wyrm.

Phase 1

  • Performs the following attacks in a cycle:
    • Quickly aligns itself along a random cardinal or diagonal direction relative to the player, roars, and charges straight at the player for 5 / 4 Expert Mode / 3.5 Revengeance Mode / 3 Death Mode seconds. It charges three times before transitioning into the next attack.
    • For 3 seconds, summons three lightning bolts from the sky every 0.5 seconds. One lightning bolt aims ahead of the player, one lightning bolt aims directly at the player, and the other aims behind the player. During this attack, the wyrm itself flies upwards.
    • Charges at the player once in a similar manner to the Charge Combo, although with 1.5x the speed.
    • Summons an Eidolon WyrmEidolon Wyrm if there are none alive, accompanied by a sound effect. During this attack, the wyrm itself flies downwards. It transitions into the next attack after 3 / 2.5 Expert Mode / 2.25 Revengeance Mode / 2 Death Mode seconds.
      • While the Adult Eidolon Wyrm is alive, all Juvenile Eidolon Wyrms lose the ability to use their telekinetic push attack.
    • Performs another Charge Combo attack.
    • For 3 seconds, summons three homing Ice MistIce Mists from below every 1 second. One mist aims ahead of the player, one mist aims directly at the player, and the other aims behind the player. During this attack, the wyrm itself flies downwards.
      • Ice Mists inflict Chilled for 3 seconds and Frozen for 1.5 seconds.
    • Performs another Fast Charge attack.
    • Summons 3 / 4 Expert Mode / 5 Revengeance Mode / 6 Death Mode EidolistEidolists if there are none alive, accompanied by a sound effect. During this attack, the wyrm itself flies downwards. It transitions into the next attack after 3 / 2.5 Expert Mode / 2.25 Revengeance Mode / 2 Death Mode seconds.

Phase 2

  • Transitions at 80% health.
  • The second charge of the first Charge Combo in the attack cycle is replaced. Instead, the wyrm spins around the player and fires projectiles from its body segments for 5 / 4.5 Expert Mode / 4.25 Revengeance Mode / 4 Death Mode seconds before transitioning into the next attack.

Phase 3

  • Transitions at 60% health.
  • The second charge of the second Charge Combo in the attack cycle is replaced. Instead, the wyrm summons a ring of 4 / 5 Expert Mode / 6 Revengeance Mode / 7 Death Mode Ancient DoomAncient Dooms which orbit around the player before bursting into four Prophecy's EndProphecy's End in each cardinal direction. After 2 / 1.75 Expert Mode / 1.67 Revengeance Mode / 1.58 Death Mode seconds, another ring appears until three rings have appeared in which it will transition into the next attack. During this attack, the wyrm itself flies upwards.
    • While performing this attack, the wyrm itself flies upwards and stays invisible.
    • The Ancient Doom ring has a radius of 37.5 / 34.38 Expert Mode / 33.44 Revengeance Mode / 32.5 Death Mode tiles from the player.
    • Ancient Dooms and their projectiles inflict Shadowflame for 2 seconds.

Phase 4

  • Transitions at 40% health.
  • The final charge of both Charge Combo attacks in the attack cycle are replaced. Instead, the wyrm accelerates towards the player for 3 / 2.5 Expert Mode / 2.25 Revengeance Mode / 2 Death Mode seconds. Then, it repositions to the left or right of the player, roars, and charges while summoning a wall of 4 / 6 Expert Mode / 8 Revengeance Mode / 10 Death Mode lightning bolts from the direction of the charge towards the player.

Phase 5

  • Transitions at 20% health.
  • Performs Fast Charge attacks instead of spawning Eidolists and Eidolon Wyrms.

Phase 6

  • Transitions at 5% health.
  • For the remainder of the fight, it becomes immune to most slowing or freezing debuffs including Eutrophication, Exo Freeze, Galvanic Corrosion, Glacial State, Kami Flu, Slow, Temporal Sadness, Time Distortion, Vaporfied, and Webbed.
  • Replaces all previous attacks with one final attack, combining the elements of the Firing Spin and Ancient Doom Ring attacks. The wyrm itself alternates between flying upwards for a very short time and spinning around the player.
    • A ring of 4 / 5 Expert Mode / 6 Revengeance Mode / 7 Death Mode Ancient DoomAncient Dooms is summoned every 2 / 1.75 Expert Mode / 1.67 Revengeance Mode / 1.58 Death Mode seconds.
    • 10 main segments simultaneously fire Ancient LightAncient Light every 2 / 1.83 Expert Mode / 1.75 Revengeance Mode / 1.67 Death Mode seconds.
    • 20 alternate segments simultaneously fire Shadow FireballShadow Fireball every 1.5 / 1.33 Expert Mode / 1.25 Revengeance Mode / 1.17 Death Mode seconds.

In Expert Mode

  • Moves and charges faster with a greater predictiveness.
  • Lightning bolts and Ice Mists travel faster.
  • Ancient Dooms spawn closer to the player.
  • Takes less time to perform most attacks excluding Lightning Rain and Ice Mist Barrage attacks.
  • Summons more Eidolists, Ancient Dooms, and lightning bolts during the Lightning Charge attacks.

In Revengeance Mode

  • Moves and charges faster with a greater predictiveness.
  • Lightning bolts and Ice Mists travel faster.
  • Ancient Dooms spawn closer to the player.
  • Takes less time to perform most attacks excluding Lightning Rain and Ice Mist Barrage attacks.
  • Summons more Eidolists, Ancient Dooms, and lightning bolts during the Lightning Charge attacks.

In Death Mode

  • Moves and charges faster with a greater predictiveness.
  • Lightning bolts and Ice Mists travel faster.
  • Ancient Dooms spawn closer to the player.
  • Takes less time to perform most attacks excluding Lightning Rain and Ice Mist Barrage attacks.
  • Summons more Eidolists, Ancient Dooms, and lightning bolts during the Lightning Charge attacks.

On the For the worthy seed

  • Moves 15% faster.
  • Takes half as much time to perform Lightning Rain and Ice Mist Barrage attacks.
  • Takes a quarter of the time to perform Eidolon Wyrm Spawn attack.

Notes

  • The Adult Eidolon Wyrm's awakening depends only on whether or not the player has the Chaos State debuff while in the Abyss, and will therefore spawn if the player enters the biome with the debuff already applied, even if the Rod of Discord or other items which inflict Chaos State are not actually being used within the Abyss.
    • As a result, if the player has the Chaos State debuff and is in the Abyss when they kill the Adult Eidolon Wyrm, it will immediately respawn.
  • The Adult Eidolon Wyrm does not require Polterghast to be defeated in order to drop weapons. Although extraordinarily difficult or even impossible to do so, the Wyrm can be defeated and its immensely powerful weapons obtained after obtaining a Rod of Discord at the beginning of Hardmode.
  • Enemies spawned by the Adult Eidolon Wyrm do not drop items or coins.

Tips

For strategies on defeating the Adult Eidolon Wyrm, including weapon and arena recommendations, see Guide:Adult Eidolon Wyrm strategies.

Trivia

  • The BestiaryBestiary entry for the Adult Eidolon Wyrm: "Traces of them appear even in records going back to before the Golden Age of Dragons… They may very well be a glimpse into the full potential of nature."
  • The Adult Eidolon Wyrm's theme is Threats of the Ocean Floor, which was made by the artist DM DOKURO.
    • The theme was originally intended to be used for the mini boss encounters in the Abyss before being scrapped and repurposed.
    • The sound the Adult Eidolon Wyrm makes when summoned resembles the first chord of the theme, and was present long before the theme was implemented.
    • If the Calamity Music add-on mod is disabled, Boss 3 will play instead.
  • An eidolon in Greek Literature is a spirit-like image of a person, either living or dead.
  • Its ice and lightning attacks are similar to those performed by the Lunatic Cultist. As well as "Eidolon" being a term used to describe something idolized (potentially in the fashion of a cult), this further establishes a connection between these enemies.
    • It may also be related to the Eidolist, as they have similar names and both spawn in the Abyss.
  • Its design is based on a creature from the aquatic exploration game Subnautica, known as the Ghost Leviathan. The original sprite was also a copy of the Ghost Leviathan's design.
    • The different life-stages makes this more evident, as there are both juvenile and adult Ghost Leviathans.
    • The Adult versions of both creatures share the similar purpose of preventing the player from doing something (Adult Ghost Leviathans protect the crater edge, while the Adult Eidolon Wyrm prevents the player from using the Rod of Discord or other short ranged teleportation items).
  • The Adult Eidolon Wyrm is a "Superboss" in this mod. In some RPG games, superbosses are extremely powerful enemies that are very challenging even if the player has endgame equipment.
  • The Adult Eidolon Wyrm could be considered the Calamity Mod version of the Dungeon Guardian since both are extremely strong enemies that are intended to prevent the player from performing a certain action.
  • In previous versions of the mod, the Adult Eidolon Wyrm could spawn at any time in the 3rd and 4th layers of the Abyss after Polterghast had been defeated.
    • Similarly to the Eidolon Wyrm, it would spawn as a passive NPC, and only attack the player if they were affected with the Chaos State debuff, or if it was attacked.
  • Prior to the 1.3.4.001 update, the Adult Eidolon Wyrm had the highest health of any NPC in the mod, with a whopping 30,000,000 / 60,000,000 Expert Mode health.
  • Prior to the 1.5.0.001 update, the Adult Eidolon Wyrm used to be considered a Mini boss.
  • Prior to the 1.5.1.001 update, the Adult Eidolon Wyrm used to be unable to be hurt by any attack that would deal more than 10% of its health in one hit, such as another mod's butcher function or an incredibly powerful weapon. When hit by such an attack, the damage is reduced to 0.
  • If the Boss Checklist Mod is installed, its unique despawn message will be "...".