Rockster

Native to terran dimensions and gemstone caverns, rocksters are tiny amiable elemanimals with a surprisingly powerful bite and a taste for glittering gems. Rocksters are exceptional burrowers, and their innate magic allows them to burrow through stone without leaving any holes. However, if a rockster wishes to, it can wreak havoc upon objects and structures with its diamond teeth that are strong enough to cut through any nonmagical material. In combat situations, a rockster will try to burrow beneath its enemies and come up under their feet to deliver a diamond bite when least expected. If wounded, a rockster can restore its health by nibbling on a gem, and many rocksters hoard precious stones for that reason.