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Umbra Stealer

Medium Monstrosity (shadowless), Neutral Evil


Armor Class 15 (natural armor)

Hit Points 78 (12d8+24)

Speed 30 ft.

STR 14 (+2)
DEX 16 (+3)
CON 14 (+2)
INT 12 (+1)
WIS 12 (+1)
CHA 10 (+0)

Saving Throws Dex +6, Wis +4

Skills Stealth +7, Perception +4

Senses darkvision 60 ft., passive Perception 14

Languages Common, Sylvan

Challenge 5 (1,800 XP) Proficiency Bonus +3


Shadowless. This creature casts no shadow. It does not produce shade and cannot be detected by effects that rely on shadows.

Actions

Multiattack. The Umbra Stealer makes three attacks: two claws and one Shadow Drain.
Claw. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) slashing damage.
Shadow Drain. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) necrotic damage. The Umbra Stealer drains life from a target. On a hit, it heals for half the necrotic damage dealt.
Shadow Snatch. The Umbra Stealer targets a creature within 15 feet. The target must succeed on a DC 14 Wisdom saving throw or have its shadow severed and bound to the Umbra Stealer for 1 minute. While bound, the target loses the benefits of shadow-based concealment and cannot benefit from invisibility in dim light or darkness. The Umbra Stealer gains 1d6 temporary HP. The shadow returns after the effect ends.

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Lore & Description

Appearance

A tall, slender figure wrapped in shifting, inky shadow. It bears no discernible face, only the outlines of a silhouette that seems to breathe with darkness. Its body is a living void, wisping at the edges as if it were made of shadow itself. It moves with uncanny, silent grace, leaving no reflection, no shadow behind, and no footprint in light. Wherever it goes, light appears to lose a little of its warmth, as if the world itself is siphoning away the glow that surrounds the Umbra Stealer. It feeds on fear and the stolen life contained within others' shadows, growing stronger as the shadows fade from the world around it.

Behavior & Origins

Legends tell of a being born from the moment a spotlight dimmed and a silhouette refused to fade. The Umbra Stealer stalks those who rely on their shadows for cunning and cover, stealing their shade to fuel its own vitality. In daylight it is barely a whisper, but as dusk falls its presence becomes palpable—an absence in the air where a shadow should be. Victory for this creature is not measured by the enemy destroyed, but by the number of shadows it has claimed. Those who recover their shadow often speak of a chill in the air—like a memory from a dream—that lingers long after the encounter has ended.

Monster Image

Umbra Stealer

Generation Info

Original prompt:
"A creature that casts no shadow but steals others."

Created: Feb 2, 2026
Modified: May 22, 2026

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