Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage, and the target is grappled (escape DC 18). Until this grapple ends, the target is restrained and takes 18 (4d8) acid damage at the start of each of its turns, and the snallygaster can't use its Slimy Tentacles on another target.