Flak Crab

The Flak Crab is a Hardmode enemy that spawns during tiers 2 and 3 of the Acid Rain event. They disguise themselves as a geyser and will move around after taking damage. When disguised, it will shoot Flak Shots, which will inflict the Irradiated debuff.

Trivia

 * This enemy is a reference to the Hermit Crab enemy from Risk of Rain 2.
 * The way Flak Crabs attack is a reference to the Aeroflak Cannon from Robocraft.
 * The Flak Crab's disguised state is tied with the Devil Fish's masked state for having the highest defense of any enemy in the mod.