Thorium Mod Wiki
Aquatic HallucinationHardmode exclusive
Aquatic Hallucination.png
EnvironmentAquatic Depths
AI TypeSwimming AI
Damage50 / 100
Max Life125 / 250
KB Resist50% / 55%
Inflicts debuffBlackout.pngBlackout
50% chance
Debuff duration1 second / 2 seconds
Debuff tooltipLight vision severely reduced
Immune toConfused.png
BannerMysterious Banner.pngMysterious Banner

The Aquatic Hallucination is a Hardmode post-Plantera enemy that spawns in the Aquatic Depths. It swims quickly toward the player when in water to deal contact damage and inflicts the Blackout debuff, but will flop around aimlessly on land. Killing one will drop an Abyssal Shadow that inflicts the player with False Presence, a debuff which stacks up to three times. On the third stack, Abyssion, The Forgotten One will emerge.


  • Care should be taken that the player does not accidentally summon Abyssion. An unaware or unprepared player might be swiftly killed by the boss.
  • Aquatic Hallucinations are slightly transparent making them harder to see than other aquatic dwellers in the biome, a hunter potion is advised if avoiding them is a must.