Yurei (5e Creature)
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Medium undead, chaotic evil
Saving Throws Con +6, Wis +6
Innate Spellcasting. The yurei's innate spellcasting ability is Charisma (spell save DC 18). She can innately cast the following spells, requiring no material components:
Painful Grasp. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 9 (1d6 + 6) slashing damage, plus 27 (6d6 + 6) psychic damage.
Slimy Suffocation. The yurei forces a creature she can see within 120 feet of her to make a DC 18 Constitution saving throw. On a failed save, foul foreign matter chokes the target's airway and it begins suffocating. The target can use its action to repeat the saving throw, coughing up the matter and ending the effect on a success. Its allies within 30 feet of it that see this horrific display become frightened of the creature until the start of its next turn.
Face of Death. The yurei exposes her face, forcing a creature that can see her within 5 feet of her to make a DC 16 Wisdom saving throw. On a failure, the target is stunned and must make a DC 13 Wisdom saving throw or drop to 0 hit points. The target can make a DC 16 Wisdom saving throw at the start of each of its turns, ending the stunning effect on itself on a success. If a creature's saving throw against the stunning effect is successful or the effect ends for it, the creature is immune to the yurei's Face of Death for the next 24 hours.
Flicker. The yurei adds 4 to its AC against one weapon attack that would hit it.
Long black hair obscures the face of this pale woman. With each motion, her body twitches and jerks.
Powerful Grudge. When a person dies a violent death in the grip of extreme emotion, such as in a blinding rage or in overwhelming sorrow, she may return from the dead as a twisted and horrific undead creature known as a yurei (sometimes also called onryo). These restless spirits remain consumed by the emotional torment that pervaded their demise, and can feel a measure of peace only while causing other creatures to suffer as they did. To accomplish this, they haunt the people and places they knew in life in search of fresh victims for their painful grasp.
Glimpsing Past. Regardless of whether she received a proper burial or not, a yurei always appears dressed in the remnants of funereal clothing, with her face obscured by long black hair. Often, the restless spirit seems to be dripping wet or caked with mud or filth, or displays other distressing signs of neglect. Her body can also appear contorted or disjointed, reflecting the pain that twists her very existence. Yurei can give nightmares to people, where she typically creates dreams wherein the target is placed in the role of her murderer, so it may suffer her vengeance from beyond the grave. Many find themselves sleepless these nights.
Undead Nature. A yurei doesn't require air, food, drink, or sleep.
Optional: Restless Nights. A yurei's lair is most often tied to an area or structure where she was brutally murdered, and the yurei tortures living creatures by subjecting them to her pain. When characters in or near a yurei's lair would attempt a long rest, they must make a DC 18 Wisdom saving throw, or be wracked with disturbing nightmares the entire night. The creature will only regain half its maximum hit points at the conclusion of the long rest. If they fail the saving throw 5 or more, they instead regain no hit points, and regain no spell slots. If they fail by 10 or more, they do not benefit from the long rest, and gain one level of exhaustion. Creatures that don't sleep, such as elves, can't be affected by this ability.