Armor Class 15 ({@item studded leather armor|PHB|studded leather})
Hit Points 136 (21d8 + 42)
Speed 30 ft.
Saving Throws DEX +7, WIS +7, CHA +5
Skills Perception +7
Damage Immunities necrotic, psychic
Condition Immunities charmed, exhaustion, frightened
Senses darkvision 60 ft., passive Perception 17
Languages Common, Elvish
Challenge 11
Fey Ancestry. The shadar-kai has advantage on saving throws against being charmed, and magic can't put it to sleep.
Magic Resistance. The shadar-kai has advantage on saving throws against spells and other magical effects.
Soul Thirst. When it reduces a creature to 0 hit points, the shadar-kai can gain temporary hit points equal to half the creature's hit point maximum. While the shadar-kai has temporary hit points from this trait, it has advantage on attack rolls.
Weight of Ages. Any Beast or Humanoid (except an elf) that starts its turn within 5 feet of the shadar-kai has its speed reduced by 20 feet until the start of that creature's next turn.
Multiattack. The shadar-kai makes two Shadow Dagger attacks.
Shadow Dagger. Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 13 (4d4 + 3) piercing damage plus 19 (3d12) necrotic damage, and the target has disadvantage on saving throws until the end of the shadar-kai's next turn. The dagger magically returns to the shadar-kai's hand immediately after a ranged attack.
Wave of Weariness (Recharge 4–6). The shadar-kai emits weariness in a 60-foot cube. Each creature in that area must make a DC 16 Constitution saving throw. On a failed save, a creature takes 45 (10d8) psychic damage and suffers 1 level of exhaustion. On a successful save, it takes half as much damage and doesn't gain a level of exhaustion.
Mordenkainen Presents: Monsters of the Multiverse, p. 214