Swarm of Poisonous Snakes

5e compatible shield

Medium swarm of Tiny beasts, unaligned

Armor Class 14
Hit Points 36 (8d8)
Speed 30 ft., swim 30 ft.

STR DEX CON INT WIS CHA
8 (-1) 18 (+4) 11 (+0) 1 (-5) 10 (+0) 3 (-4)

Saving Throws 
Skills 
Damage Resistances bludgeoning, piercing, slashing
Damage Immunities 
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses blindsight 10 ft., passive Perception 10
Languages --
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.

Actions

Bites. Melee Weapon Attack: +6 to hit, reach 0 ft., one creature in the swarm’s space. Hit: 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.