Once-chief of the Bonesworm goblin tribe, he combined his tribe with the Wasting Moon tribe to form Zarr’s Invincible Army. The army claims most of the northern chambers of the Dungeon Level of Undermountain, , while fighting a war with the undead creatures in the northern halls.

He is pledged to the Xanathar Guild, and his goblins harass adventurers entering Undermountain from the Entry Well. They recently wiped out most of the Bronzestar Company.