Anthrotipede

Burrow. The Anthrotipede can burrow if the ground is made of dirt, soil, or any similar material(Not including stone or rocks), to move underground, unable to strike until the next turn, unless it chooses to stay underground. This ability gives the Anthrotipede advantage on stealth checks.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 4 (1d4 + 2) piercing damage, and the target must succeed on a DC 11 Constitution saving throw or take 10 (3d6) poison damage. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.

Unarmed Strike. Melee Weapon Attack: +2 to hit, reach 5ft., one creature. Hit: 6 (2d6) bludgeoning damage. After this attack hits, the Anthrotipede can attempt a Bite attack as a bonus action to grapple instead of poisoning the target, with a DC 12.