Swarm of Centipedes

Armor Class 12

Hit Points 22 (5d8)

Speed 20 ft., climb 20 ft.

Initiative +1

Damage Resistances bludgeoning; piercing; slashing

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

Senses blindsight 10 ft., passive Perception 8

Challenge 1/2 (100 XP)

Source Monster Manual

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 insect. The swarm can't regain hit points or gain temporary hit points.

Bites. Melee Weapon Attack: +3 to hit, reach 0 ft., one target in the swarm's space. 10 (4d4) piercing damage, or 5 (2d4) piercing damage if the swarm has half of its hit points or fewer. A creature reduced to 0 hit points by a swarm of centipedes is stable but poisoned for 1 hour, even after regaining hit points, and paralyzed while poisoned in this way.