Swarm of Bats

Large Beast, Unaligned

AC: 12

Initiative: +2 (12)

HP: 11 (2d10)

Speed: 5 ft., fly 30 ft.

STR
5 (-3)
DEX
15 (+2)
CON
10 (+0)
INT
2 (-4)
WIS
12 (+1)
CHA
4 (-3)

Resistances: bludgeoning; piercing; slashing

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

Senses: Blindsight 60 ft., Passive Perception 11

CR: 1/4 (XP 50; PB +2)

Habitat: Forest, Mountain, Underdark, Urban

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 Attack Roll: +4, reach 5 ft. Hit: 5 (2d4) Piercing damage, or 2 (1d4) Piercing damage if the swarm is Bloodied.

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Swarm of Bats

Source: Monster Manual (2025), p. 370 - Licenses and attribution