Swarm of Bats

Medium Beast Unaligned

CR 1/4

Damage Resistances: bludgeoning, piercing, slashing
Condition Immunities: charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses: blindsight 60 ft., passive Perception 11
Environment: underdark, mountain, hill, urban

Combat Reference

(5d8)

Speed 0 ft., fly 30 ft.

STR 5 -3

DEX 15 +2

CON 10 +0

INT 2 -4

WIS 12 +1

CHA 4 -3

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 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.