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Underworld Sentinel

Huge · Undead · CR 10 · Neutral

Source. Tome of Beasts 3

17 (natural armor)

126 (12d12+48)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

WIS

CHA

Overview

Category Monsters

Size Huge

Type Undead

Alignment Neutral

XP 5900

Initiative Bonus +2

Movement

Walk 40 ft (12.2 m)

Swim 20 ft (6.1 m)

Climb 20 ft (6.1 m)

Crawl 20 ft (6.1 m)

Senses

Darkvision 120 ft (36.6 m)

Blindsight 60 ft (18.3 m)

Passive Perception 17

Saving Throws

Dexterity +6 Constitution +8 Wisdom +7

Skills

Perception +3

Languages

Darakhul, Giant, Undercommon

Resistances & Immunities

Damage Immunities

poison

Damage Resistances

necrotic; nonmagic B/P/S attacks

Condition Immunities

charmed, exhaustion, poisoned

Traits

Passage Guardian

Can make an opportunity attack when a hostile creature moves within its reach as well as when a hostile creature moves out of its reach. It gets one extra reaction that be used only for opportunity attacks.

Turn Immunity

Is immune to effects that turn undead.

Undead Nature

Doesn't require air food drink or sleep.

About Underworld Sentinel

Underworld Sentinel is a huge undead with a Challenge Rating of 10. It has a neutral alignment.

In combat, this creature maintains an Armor Class of 17 and possesses 126 hit points (derived from 12d12+48).

Underworld Sentinel has communication capabilities including Darakhul, Giant, Undercommon. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Underworld Sentinel

2 tips available

When using Underworld Sentinel in your D&D 5e campaign, consider these tactical approaches:

Boss Encounter: Suitable for climactic moments
Multi-phase Battle: Plan dramatic tension with multiple phases

Player Guide: Facing Underworld Sentinel

2 strategies available

When your party encounters this creature, keep these strategies in mind:

Major Threat: Prepare for epic battle
Resource Management: Conserve powerful abilities

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 10.

Solo Encounter:

A single character of level 13 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 11,000 XP
Hard: 16,500 XP
Deadly: 22,000 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Underworld Sentinel?: Underworld Sentinel has a Challenge Rating of 10, making it appropriate for parties of level 10.0.
What type of creature is Underworld Sentinel?: Underworld Sentinel is a Huge Undead, which affects how certain spells and abilities interact with it.
What languages does Underworld Sentinel speak?: Underworld Sentinel can communicate in Darakhul, Giant, Undercommon.