Skeleton Commando

The Skeleton Commando is an enemy that spawns in the Dungeon in Hardmode, post-Plantera worlds and fires Rockets at the Player, which explode when contacting blocks. They are immune to the Poisoned and Venom debuffs. Like the Blue Armored Bones, they only spawn in dungeon areas with a Brick Wall. They deal large amounts of damage from a distance, so a good way to fight them is to interrupt their attacks during the brief period between firing. In addition to that, they usually have the protection of Blue Armored Bones surrounding them, making them a formidable enemy well into Hardmode.