Pack Tactics. The kruthik has advantage on an attack roll against a creature if at least one of the kruthik's allies is within 5 feet of the creature and the ally isn't incapacitated.

Tunneler. The kruthik can burrow through solid rock at half its burrowing speed and leaves a 2½-foot-diameter tunnel in its wake.

Stab. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:5 (1d4 + 3) piercing damage.