Grimlock

Blindsight

You have no eyes, and cannot be blinded. You can perceive your surroundings within 30 ft., or 10 ft. while deafened. You are considered blind beyond this radius.

Keen Hearing and Smell

You have advantage on Wisdom (Perception) checks that rely on hearing or smell.

Stone Camouflage

You have advantage on Dexterity (Stealth) checks made to hide in rocky terrain.

Languages

You can speak, read, and write Undercommon.