Swarm of Bats

Medium swarm of Tiny beasts, unaligned

Armor Class 12

Hit Points 22 (5d8)

Speed 0ft., fly 30ft.

Damage Resistances bludgeoning, piercing, slashing

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

Senses blindsight 60ft., passive Perception 11

Languages -

Challenge 1/4 (50 XP)

Traits

Echolocation

The swarm can't use its blindsight while deafened.

Keen Hearing

The swarm has advantage on Wisdom (Perception) checks that rely on hearing.

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

Actions

Bites

Melee Weapon Attack: +4 to hit, reach 0ft., one creature in the swarm's space. Hit: 5 (2d4) piercing damage, or 2 (1d4) piercing damage if the swarm has half of its hit points or fewer.