If a new one is added they could even make it the Packmaster subdungeon

Or you could even have a goblin Miner guarding a set of 5 defused goblin mines (pallete swap to blue, and make them give 15/20 CP as opposed to 25 and have no other functionality whatsoever). I'd like it as a standard subdungeon if the tileset matched whatever the place you were in, as if the Goblin acidentaly mined into there
