The Irradiated Behemoth is the third mini boss fought in the Abandoned Lab and the last one faced in Hardmode before the Moon Lord is defeated.
While the Irradiated Behemoth is alive, the music Boreal Defendant will play.
Spawn[edit | edit source]
The Irradiated Behemoth does not spawn on its own and is summoned by right-clicking the monitor in the Abandoned Lab's Beta Sector, which is unlocked after defeating the Stage 3 Infected Scientist.
Behavior[edit | edit source]
It behaves like a vertical Wall of Flesh, moving downwards slowly. While descending, it will alternate between firing several 3-shot spreads of tile-piercing gas projectiles or a barrage of fast green slime projectiles.
Being above the Behemoth causes it to fire gas clouds upwards that incur massive damage, meaning that it effectively instantly kills the player if it crushes them.