Grab

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 22 (5d6 + 5) bludgeoning damage. If the target is a Medium or smaller creature it is grappled (escape DC 11).

Bite

Melee Weapon Attack: +3 to hit, reach 5 ft., one grappled target. Hit: 32 (5d10 + 5) piercing damage and the horde regains the same number of hit points.