Large Construct (Swarm), neutral
Armor Class 14 (natural armor)
Hit Points 52 (8d10+8)
Speed fly +50, walk +30
Challenge 3
Damage Resistances bludgeoning, piercing, and slashing
Damage Immunities fire, poison, psychic
Condition Immunities charmed, frightened, paralyzed, petrified, prone, restrained, stunned
Senses darkvision 60 ft., passive Perception 11
Languages -
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 construct. The swarm can't regain hit points or gain temporary hit points.
Bites. Melee Weapon Attack: +5 to hit, reach 0 ft., up to 4 creatures in the swarm's space. Hit: 17 (5d6) piercing damage plus 3 (1d6) poison damage.
Source: Tome of Beasts · OGL/Open