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Swarm of Stirges

Medium monstrosity, Unaligned

Armor Class 14

Hit Points 36 (8d8)

Speed 10 ft., fly 40 ft.

STR 4 (-3)
DEX 16 (+3)
CON 11 (+0)
INT 2 (-4)
WIS 8 (-1)
CHA 6 (-2)

Damage Resistances bludgeoning, piercing, slashing

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

Senses Darkvision 60 ft., passive Perception 9

Languages

Challenge 2

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 creature. The swarm can't regain Hit Points or gain Temporary Hit Points.

Actions

Swarm of Proboscises. m +5, reach 5 ft. Hit: 14 (2d10 + 3) Piercing damage, or 8 (1d10 + 3) Piercing damage if the swarm is Bloodied. If the target is a Medium or smaller creature in the swarm's space, the target has the Grappled condition (escape DC 13). Until the grapple ends, the target takes 7 (2d6) Necrotic damage at the end of each of its turns.

Source

Monster Manual (2024), p. 299