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Wastrilith

Large Fiend (Demon) · · CR 13

  • Fiend (Demon)
  • Large
  • Tier 3

Ranges across coastal, swamp, underground, and underwater; Wastrilith lists at CR 13 as a large fiend (demon). Sourced from Monsters of the Multiverse and Mordenkainen's Tome of Foes.

Stat Block

Challenge Rating
13
Type
Fiend (Demon)
Size
Large
Alignment
Speed
30 ft., swim 80 ft.
Habitats
Coastal, Swamp, Underground, Underwater
Sources
Monsters of the Multiverse, Mordenkainen's Tome of Foes

Ecology

Wastrilith is a creature of the Lower Planes, present in the mortal world via summoning, banishment-failure, or a planar breach. It is most often found in coastal regions. It is large-sized, which shapes how it hunts, hides, or fights.

Behaviour

Wastrilith is cruel and patient, willing to take centuries to repay an insult. Its alignment varies by individual or is irrelevant — it acts on instinct, drive, or whoever commands it. It is intelligent enough to plan, scheme, or remember.

Origin

Wastrilith is reprinted in Monsters of the Multiverse and expanded in Mordenkainen's Tome of Foes. Fiends originate in the Lower Planes — the Nine Hells, the Abyss, or further hells beyond — bound to whatever cosmic hierarchy that plane enforces. Within a campaign, its existence anchors a region with the kind of weight only an old, named species carries.

CR 13 monstersAll Fiend (Demon)sCoastalSwampUndergroundUnderwater

Related Monsters

Frequently Asked Questions about Wastrilith

What is the challenge rating of Wastrilith?
Listed CR for Wastrilith: 13. Match it to a party that fits late-campaign adventuring parties.
What type of creature is Wastrilith?
The bestiary type for Wastrilith is fiend (demon), large size.
Where does Wastrilith live?
The bestiary places Wastrilith in Coastal, Swamp, Underground, Underwater.
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Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/wastrilith. Point a phone camera at this code to open the Wastrilith page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.