Swarm of Poisonous Snakes

Armor Class 14

Hit Points 36 (8d8)

Speed 30 ft., swim 30 ft.

Initiative +4

Damage Resistances bludgeoning; piercing; slashing

Condition Immunities charmed; frightened; grappled; paralyzed; petrified; prone; restrained; stunned

Senses blindsight 10 ft., passive Perception 10

Challenge 2 (450 XP)

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

Bites. Melee Weapon Attack: +6 to hit, reach 0 ft., one creature in the swarm's space. 7 (2d6) piercing damage, or 3 (1d6) piercing damage if the swarm has half of its hit points or fewer. The target must make a DC 10 Constitution saving throw, taking 14 (4d6) poison damage on a failed save, or half as much damage on a successful one.