Sibriex
Huge Fiend (Demon) · · CR 18
- Fiend (Demon)
- Huge
- Tier 4
Sibriex at CR 18 is logged as a huge fiend (demon). Habitat: underground. Sourced from Monsters of the Multiverse and Mordenkainen's Tome of Foes.
Stat Block
- Challenge Rating
- 18
- Type
- Fiend (Demon)
- Size
- Huge
- Alignment
- —
- Speed
- 0 ft., fly 20 ft. (hover)
- Habitats
- Underground
- Sources
- Monsters of the Multiverse, Mordenkainen's Tome of Foes
Ecology
Sibriex 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 underground regions. It is huge-sized, which shapes how it hunts, hides, or fights. As a legendary creature, it is rare in the world and likely the only specimen of its kind in the local region.
Behaviour
Sibriex 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. Spellcasting expands its repertoire well beyond what its physical stat block alone suggests.
Origin
Sibriex 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.
Related Monsters
Frequently Asked Questions about Sibriex
- What is the challenge rating of Sibriex?
- Sibriex has a challenge rating of 18. It matches the highest-tier encounter math.
- What type of creature is Sibriex?
- By creature type, Sibriex is a fiend (demon), huge size.
- Where does Sibriex live?
- The bestiary places Sibriex in Underground.