Swarm of Corrupted Rats

Medium Monstrosity, Unaligned

AC: 12

Initiative: +2 (12)

HP: 27 (6d8)

Speed: 30 ft., climb 30 ft.

STR
9 (-1)
DEX
14 (+2)
CON
10 (+0)
INT
2 (-4)
WIS
11 (+0)
CHA
4 (-3)

Saving Throws: Dex +4

Resistances: bludgeoning; piercing; slashing

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

Senses: Darkvision 30 ft., Passive Perception 10

CR: 1 (XP 200; PB +2)

Death Burst.

The rat explodes when it dies. Constitution Saving Throw: DC 10, each creature in a 10-foot Emanation originating from the rat. Failure: 2d4 Acid Damage. Success: Half damage.

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 rat. The swarm can't regain Hit Points.

Actions

Bite.

Melee Attack Roll: +4, Reach 5 ft. Hit: 6 (2d4 + 2) Piercing damage or 1d4 + 2 Piercing damage if the swarm is Bloodied.

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Swarm of Corrupted Rats

Source: Stranger Things: Welcome to the Hellfire Club - Licenses and attribution