Tactical Skeleton

The Tactical Skeleton is a Hardmode, post-Plantera enemy that appears in the Dungeon. Because it is armed with a Tactical Shotgun, the Tactical Skeleton stays a distance away from the player in order to fire. They are immune to the Poisoned and Venom debuffs just like the Hell Armored Bones. They are most common in areas backed with Tiled Walls.

It is one of the few enemies that can be detected by the Lifeform Analyzer.

Trivia

 * While it seems to wield what is presumably the Shotgun, it drops the the Tactical Shotgun, which is fully automatic.