Medium Beast, unaligned
Armor Class 14 (natural armor)
Hit Points 36 (8d8)
Speed walk +20, climb +20
Challenge 3
Skills perception -2
Condition Immunities charmed, frightened, paralyzed, petrified, prone, restrained, stunned
Senses blindsight 30', passive Perception 8
Languages —
Constant Clacking. A creature that starts its turn in the swarm's space takes 5 (1d10) thunder.
Swarm. Can occupy another creature's space and vice versa and swarm can move through any opening large enough for a Tiny creature. Swarm can't regain hp or gain temp hp.
Bite. Melee Weapon Attack: +3 to hit 0' 1 tgt in the swarm's space. 14 (4d6) piercing damage or 7 (2d6) piercing damage if the swarm has half of its hp or fewer.
Source: Tome of Beasts 3 · OGL/Open