Bite. Melee Weapon Attack: +5 to hit 1d20+5 , reach 5 ft., one target. Hit: 7 (1d8 + 5) 1d8+5 piercing damage. If the target is a Large or smaller creature, it must succeed on a DC 13 Dexterity saving throw or be stuck in the whirling maw of teeth and forward-facing feelers. A stuck creature is grappled.
Mosonite Worm (rock worm)
Underground, tunnels