Bone Swarm

Large Swarm Chaotic Evil

• Armor Class: 17 (natural armor)
• Hit Points: 198 (36d10)
• Speed: walk 60 ft. fly 20 ft.
• Challenge Rating: 10 (5,900 XP)
• Source: Tome of Beasts 2023, page 41

• Saving Throws: Dex +8, Wis +6, Cha +9
• Skills: Acrobatics +8, Perception +6, Stealth +8
• Damage Vulnerabilities: bludgeoning
• Damage Immunities: poison
• Damage Resistances: piercing and slashing from nonmagical attacks
• Condition Immunities: charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned
• Senses: darkvision 60 ft., passive Perception 16
• Languages: Common, Void Speech

Special Abilities

• 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 human skull. The swarm can't regain hp or gain temporary hp.
• Undead Nature: The bone swarm doesn't require air, food, drink, or sleep.

Actions

• Multiattack: The bone swarm makes two Swirling Bones attacks. It can replace one Swirling Bones attack with one Death's Embrace attack, if available.
• Swirling Bones: Melee Weapon Attack: +10 to hit, reach 0 ft., one creature in the swarm's space. Hit: 36 (8d8) bludgeoning, piercing, or slashing damage (the bone swarm's choice), or 18 (4d8) bludgeoning, piercing, or slashing damage (the bone swarm's choice) if the swarm has half of its hp or fewer.
• Death's Embrace (Recharge 5-6): Melee Weapon Attack: +10 to hit, reach 0 ft., one creature in the swarm's space. Hit: The target is grappled (escape DC 16) if it is a Large or smaller creature. Until this grapple ends, the creature is restrained and any attack against the bone swarm has a 50 percent chance of hitting the grappled creature instead. The bone swarm can have only one creature grappled at a time. The grappled creature has advantage on ability checks made to escape the grapple when the bone swarm has half of its hp or fewer.

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