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Bone Swarm

Large Undead · Chaotic Evil · CR 10

  • Undead
  • Large
  • Tier 2
  • Evil

As a large undead (chaotic evil), Bone Swarm carries CR 10. Common in any environments. Sourced from Tome of Beasts 1.

Stat Block

Challenge Rating
10
Type
Undead
Size
Large
Alignment
Chaotic Evil
Speed
20, fly 60
Habitats
Any
Sources
Tome of Beasts 1

Ecology

Bone Swarm is a creature that has crossed the threshold of death; its continued presence is itself a violation of natural law. It is most often found in any regions. It is large-sized, which shapes how it hunts, hides, or fights.

Behaviour

Bone Swarm is haunted by what it was in life; its goals echo old grievances or the will of the necromancer who raised it. Its Chaotic Evil alignment shapes how it engages with the world — predictable in tendency, even when unpredictable in detail. It is intelligent enough to plan, scheme, or remember.

Origin

Bone Swarm is introduced in Kobold Press's Tome of Beasts 1 (2016). Undead are the wounds the Negative Plane leaves on the mortal world — every undead has a death story behind it. Within a campaign, its existence anchors a region with the kind of weight only an old, named species carries.

CR 10 monstersAll UndeadsAny

Related Monsters

Frequently Asked Questions about Bone Swarm

What is the challenge rating of Bone Swarm?
Bone Swarm has a challenge rating of 10. It fits levels 5-11.
What type of creature is Bone Swarm?
By creature type, Bone Swarm is a undead, large size, chaotic evil alignment.
Where does Bone Swarm live?
Geography doesn't constrain Bone Swarm — the 'Any' tag covers all terrain.
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QR code linking to Bone Swarm — https://www.doungim.com/dnd/monsters/bone-swarm Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/bone-swarm. Point a phone camera at this code to open the Bone Swarm page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.
Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/bone-swarm. Point a phone camera at this code to open the Bone Swarm page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.