Swarm of Bats

Medium beast · CR 1/4

Armor Class 12

Hit Points 22 (5d8)

Speed fly 30 ft.

STR 5 -3

DEX 15 +2

CON 10 +0

INT 2 -4

WIS 12 +1

CHA 4 -3

Damage Resistances bludgeoning, piercing, slashing

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

Senses blindsight60 ft. , passive Perception 11

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.

Bites. Melee/Ranged Weapon Attack: +4 to hit.: Melee Weapon Attack: +4 to hit, reach 0 ft., 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.