Swarm of Bats

Stat block

A shrieking cloud that envelops a creature and bites; resists weapon damage, weakens once Bloodied.

• Resistant: bludgeoning, piercing, slashing
• Condition immunities: charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
• Senses: blindsight 60 ft; passive Perception 11

Traits

• Swarm. The swarm can move into and stay in another creature's space, and other creatures can enter its space. It can pass through any opening wide enough for one Tiny bat. The swarm can't regain Hit Points and can't gain Temporary Hit Points.

Actions

• Bites. Hit: 5 (2d4) Piercing damage, or only 2 (1d4) Piercing damage if the swarm is Bloodied.

Where you meet it

• Castle Ravenloft, the Catacombs: The black horse lifts its head from the manger, and the man beside it turns around.
• Castle Ravenloft, Strahd's Tomb: Two pale shapes rise from behind the dais, and the ceiling comes loose and becomes bats.
• Castle Ravenloft, Strahd's Tomb: He is out of the coffin before the lid stops rocking, and he is not at all sleepy.
• Castle Ravenloft, the Old Tombs: Strahd stands at the foot of his brother's tomb with one hand on the stone. He finishes what he was saying to…
• Castle Ravenloft, the Court of the Count: He is reading by the fire. He finishes the page before he looks up, and marks it with a ribbon, and the…
• Castle Ravenloft, the Main Floor: Strahd sets down his glass. At my table, he says, almost fondly. The candles gutter, and the dark above the…
• Castle Ravenloft, the Overlook: A tall figure stands at the parapet with his back to you, looking down at the valley. He lets you come quite…
• Castle Ravenloft, the High Tower: Two shapes unfold from the underside of the stair above and drop onto the steps, and the well fills with bats.
• Castle Ravenloft, the Tower Rooms: Escher's smile goes long in the teeth. The bats in the canopy of his bed come down like a dropped curtain.
• The Hill Trail above Lake Zarovich: The count's fowlers drop out of the dead pine, and the bats come down after them like a black sheet shaken…
• Vallaki: Black Roses · Two more girls come over the rooftops at Catalina's call, barefoot, in nightgowns, their arms full of black…
• Vallaki: Black Roses · The three graves open from underneath. Catalina climbs out first, and brushes the earth off her nightgown,…
• St. Andral's Church: The Bones of St. Andral · Glass bursts inward along both walls of the nave. Pale shapes come through the windows head first, like…
• Van Richten's Tower: Something is waiting where the causeway meets the shore: two pale figures standing very still, and above them…
• Village of Barovia: The Polite Caller · The carriage lamp stops at the end of the lane. Its door opens on nothing, and a tall shape in a coachman's…

On the road: Bonegrinder Lane, Svalich Road, Svalich Woods