Its a creature thats fom rocks can find him on scorched earth ragnarok (lava elemental)
Rock Elemental
The Rock Elemental is a massive rock monster that is typically found disguised as a stone formation. When a survivor enters its territory, it will begin thrashing and throwing large boulders. Once tamed, it can be a highly effective siege weapon to bring into battle.
How to survive, fight, and kill a wild Rock Elemental, from players who have done it.