Possessed Armor

Possessed Armor is a Hardmode enemy which spawns at the surface and underground at night. It walks quickly, and can open doors regardless of it being a Blood Moon or not. It casts a motion blur similar to that of the Shadow Armor.

Possessed Armor is immune to the Poisoned and On Fire! debuffs.

Trivia

 * Its sprite looks similar to the Ancient Cobalt Armor sprite, except with the Iron Armor helmet.