Grasping Hands. A creature that starts its turn while in the swarms space must make a Strength save (DC13), or be restrained. The creature can attempt the save again at the beginning of their next turn

Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a Small humanoid. The swarm can’t regain hit points or gain temporary hit points.

Slash. Melee Weapon Attack: +4 to hit, reach 0 ft., one target in the swarm’s space. Hit: 11 (2d8 + 2) slashing damage, or 6 (1d8 + 2) slashing damage if the swarm has half of its hit points or fewer.