5e:Bone Swarm

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See Swarm of Bones (disambiguation)

D&D 5e Kobold Press OGL ʰ 
Tome of Beasts

Bone Swarm
Large Swarm  of Tiny Undead, Chaotic Evil
Armor Class: 17 (natural armor)
Hit Points: 198 (36d10)
Speed: 20 ft., fly 60 ft.
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 Vulnerability: bludgeoning
Damage Resistances: piercing and slashing from nonmagical weapons.
Damage Immunity: poison
Condition Immune: charmed, exhaustion, frightened, paralyzed, poisoned, prone, restrained, stunned
Senses: darkvision 60 ft., passive perception 16
Languages: Common, Void Speech
Habitat: Coastal, Hill, Mountain, Underground
Challenge: 10 (5,900 xp)Proficiency Bonus (PB): +4
Features Strength of Bone. A bone swarm can choose to deal bludgeoning, piercing, or slashing damage, and adds 1.5× its Strength bonus on swarm damage rolls as bits and pieces of broken skeletons claw, bite, stab, and slam at the victim. Swarm. The swarm can occupy another creature’s space and vice versa, and the swarm can move through any opening large enough for a human skull. The swarm can’t regain hit points or gain temporary hit points.  Actions Multiattack. The bone swarm can attack every hostile creature in its space with swirling bones. Swirling Bones. Melee Weapon Attack: +10 to hit, reach 0 ft., one creature in the swarm's space. Hit: 31 (5d8+9) bludgeoning, piercing, or slashing damage (includes Strength of Bone special ability. 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) and enveloped within the swarm’s bones. The swarm can force the creature to move at its normal speed wherever the bone swarm wishes. Any non-area attack against the bone swarm has a 50% chance of hitting a creature grappled in Death’s Embrace instead.

End of the source material

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Unofficial Description: Animated pile of undead bones.

Sources and Notes

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Monster data ⁺

Bone Swarm (Sort Text: Bone Swarm 5e, Size: Large, Type: Swarm, Subtypes: Undead, Alignment: Chaotic Evil, HP: 198, CR: 10, Features: Strength of Bone • Swarm • Multiattack • Swirling Bones • Death's Embrace, Has Lair: No, NPC: No, Canon: No, Pointer: No, UA: No, User: No, Sources: Tome of Beasts)