Armor Class 17 (natural armor)
Hit Points 114 (12d8 + 60)
Speed 30 ft., climb 30 ft.
Saving Throws CON +8, INT +4, WIS +3, CHA +6
Skills Arcana +7, Deception +6, Perception +3, Stealth +4
Senses truesight 60 ft., passive Perception 13
Languages Common, Elvish, Sylvan
Challenge 6
Boon of Immortality. Endelyn is immune to any effect that would age her, and she can't die from old age.
Eclipsed Doom. Endelyn can be killed only if she is reduced to 0 hit points during a solar eclipse or while she is within 60 feet of a symbolic representation of one. Otherwise, Endelyn disappears in a cloud of inky smoke when she drops to 0 hit points, along with anything she was wearing or carrying, and reappears 24 hours later in the same location or the nearest unoccupied space.
Uncanny Awareness. Endelyn can't be surprised.
Multiattack. Endelyn makes two Puppeteer's Lash attacks
Puppeteer's Lash. Melee or Ranged Spell Attack: +6 to hit, reach 5 ft. or range 60 ft., one creature. Hit: 17 (4d6 + 3) psychic damage, and if the target is Large or smaller, Endelyn telekinetically moves it up to 10 feet in any direction horizontally.
WBtW, p. 217