Umber Hulk (Dungeons & Dragons)

Overview

The umber hulk is a chitin-armored underground predator that can tunnel through solid rock. The 2014 preview describes it waiting within cavern walls, using feelers to detect movement before bursting through with claws and mandibles. Its exterior endures rockfalls and collapses in the narrative, without an unrestricted immunity rule. Abandoned tunnels can connect formerly separated spaces. The preview links its confusing gaze with incomplete recollection: survivors may struggle to identify the attacker, giving unexplained disappearances a place in its reputation.

The legacy gaze can require a Charisma save when another creature sees its eyes at the start of a turn. Failure disrupts reactions and behavior; averting one's eyes trades protection for being unable to see the opponent. The revised treatment instead delivers confusion through a recharging bonus action affecting a cone, using a Wisdom save. Its physical sequence becomes repeated Rend attacks, and its rock tunnel has a larger circular cross-section. The legacy eye-aversion procedure should not be silently transferred into the revised ability.

The revised manual also describes an individualistic ecology. Umber hulks usually hunt alone and keep away from one another's territory, although they possess their own means of communication. Beholders and mind flayers can compel their service; this is coercion, not evidence that the monsters normally seek those alliances. Predatory behavior, a distinct language and outside domination can coexist without requiring a reconstructed empire or a claim that every umber hulk belongs to one organized civilization.

First appearances & development

The selected bibliography spans a third-edition manual, the 2014 publisher preview and the revised manual published in 2025. This account follows those dated presentations rather than treating every rule as timeless anatomy. In particular, the gaze's trigger, saving throw and area change between fifth-edition versions while the burrowing predator remains recognizable.

Canon & continuity

The complete 2014 preview supplies the wall ambush, memory effect and legacy gaze procedure. Roll20's licensed revised-manual text supplies solitary territorial behavior, coercive service and the changed attacks. Publisher release metadata distinguishes its 2025 publication from 2024 product branding. The older third-edition volume remains bibliography rather than a newly reread rules source.

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

1. 01

   Monster Manual (2014)

   Wizards of the Coast · 2014

   Legacy fifth-edition preview: rock ambush, confused recollection and eye-triggered gaze.

2. 02

   Monster Manual (2000)

   Wizards of the Coast; Skip Williams, Jonathan Tweet and Monte Cook · 2000

   Third-edition creature treatment; included for historical comparison, not as the source of fifth-edition mechanics.

3. 03

   Monster Manual (revised fifth edition)

   Wizards of the Coast · 2025

   Revised umber hulk: solitary ecology, coercive service and reworked gaze and tunneling.

Family, evolution & connections

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

1. OfficialUmber Hulk (Dungeons & Dragons) — official franchise guideResearch access: 2026-10-05
2. Primary workUmber Hulk — licensed revised manual textResearch access: 2026-10-05
3. OfficialRevised Monster Manual — publisher release listingResearch access: 2026-10-05

Image credits

A sourced illustration has not yet been added. This gap is included in the coverage record.