Your character has adapted to life on asteroids and subterranean environments, with a hardy fortitude and steady hands suited for harsh environments.
Ability Score Increase. Your Strength score increases by 1.
Hardened Muscles. You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Mining Adaptation. You ignore difficult terrain caused by rocky or unstable surfaces and have advantage on saving throws against environmental hazards like tremors or cave-ins.
Tunnel Crawler. You have a climbing speed of 20 feet.