Constrict - Giant Constrictor Snake

Monster Manual - 5e

Constrict. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 13 ( 2d8 + 4 ) bludgeoning damage, and the target is grappled (escape DC 16). Until this grapple ends, the creature is restrained, and the snake can’t constrict another target.