# 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

| STR | DEX | CON | INT | WIS | CHA |
| --- | --- | --- | --- | --- | --- |
| 22 (+6) | 18 (+4) | 10 (+0) | 9 (-1) | 15 (+2) | 20 (+5) |

- **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.