Beetlebeasts are powerful subterranean predators whose ironlike claws allow them to burrow through solid stone in search of prey. Beetlebeasts are tremendously strong, standing nearly 8 feet tall and over 5 feet wide. Muscles bulge beneath their exoskeletons and their powerful arms and legs all carry great claws. They have no necks to speak of, but the head features a powerful maw with 8-inch mandibles capable of biting through any hide, bone or steel and composites. Their eyes are mere blackened dots each the size of a small coin.
For all of their monstrous features, beetlebeasts are intelligent opponents. They lie in wait for passing prey, peeking through a crack they've made, until likely prey walks by. The rock devil then springs out upon its startled victim. When using this technique, opponents have a +4 modifier on their ST for Stealth checks. Other tactics involve planned cave-ins and dead-end tunnels and burrowing up underneath their chosen prey. Their burrowing rate varies from 4 meters per turn in solid stone to 6 meters per turn in soft earth.
AC: 16, HD: 8d6, THB: +8, Att: 3 claws 2d6, claw 2d6 and bite 3d6, St: 11+ (Survival and Stealth), MV: 6 (Burrow 4-6), SPC: Optional Movement (Burrowing), Dark Vision, Immunity to Cold, Radiation Resistance (+8 to save vs. any kind of radiation poisoning),
Notes: My players had a chance run-in with a Rock Devil this past Sunday. It is only due to some fast thinking and accidentally coordinated action allowed them to escape the beast.