Skip to main content

Underworld Sentinel

Huge Undead · Neutral · CR 10

  • Undead
  • Huge
  • Tier 2
  • Neutral

Ranges across underground and urban; Underworld Sentinel lists at CR 10 as a huge undead (neutral). Sourced from Tome of Beasts 3.

Stat Block

Challenge Rating
10
Type
Undead
Size
Huge
Alignment
Neutral
Speed
40
Habitats
Underground, Urban
Sources
Tome of Beasts 3

Ecology

Underworld Sentinel 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 underground regions. It is huge-sized, which shapes how it hunts, hides, or fights.

Behaviour

Underworld Sentinel is haunted by what it was in life; its goals echo old grievances or the will of the necromancer who raised it. Its Neutral 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

Underworld Sentinel is introduced in Kobold Press's Tome of Beasts 3 (2022). 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 UndeadsUndergroundUrban

Related Monsters

Frequently Asked Questions about Underworld Sentinel

What is the challenge rating of Underworld Sentinel?
The CR on Underworld Sentinel is 10. That CR works against tier-2 parties.
What type of creature is Underworld Sentinel?
The bestiary type for Underworld Sentinel is undead, huge size, neutral alignment.
Where does Underworld Sentinel live?
In the bestiary, Underworld Sentinel appears in Underground, Urban.
Share
Scan to open Underworld Sentinel on your phone
QR code linking to Underworld Sentinel — https://www.doungim.com/dnd/monsters/underworld-sentinel Scannable QR code encoding the URL https://www.doungim.com/dnd/monsters/underworld-sentinel. Point a phone camera at this code to open the Underworld Sentinel 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/underworld-sentinel. Point a phone camera at this code to open the Underworld Sentinel page on your mobile device — useful at the table when a DM's laptop or a printed sheet is showing the page.