Medium Beast
Armor Class 14
Hit Points 45 (10d8)
Speed swim +30, walk +30
Challenge 2
Damage Resistances bludgeoning, piercing, slashing
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned, unconscious
Senses blindsight 10 ft., passive Perception 10
Swarm. The swarm can occupy another creatures space and move through any opening large enough for a Tiny creature. It can't gain hit points or temporary hit points.
Bites. Melee Weapon Attack: +6 to hit, reach 0 ft., one target. Hit: 7 (2d6) piercing damage plus 14 (4d6) poison damage or 3 (1d6) poison damage plus 7 (2d6) poison damage if the swarm is bloodied.
Source: Level Up Advanced 5e Monstrous Menagerie · OGL/Open