Lilitu (5e Creature)
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Medium fiend (shapechanger), neutral evil
Damage Resistances acid, cold, fire; bludgeoning, piercing, and slashing from nonmagical attacks
Innate Spellcasting. The lilitu's spellcasting ability is Charisma (spell save DC 19). She can innately cast the following spells, requiring no material components:
Magic Resistance. The lilitu has advantage on saving throws against spells and other magical effects.
Cantrips (at will): mending, sacred flame, thaumaturgy
Telepathic Bond. The lilitu ignores the range restriction on her telepathy when communicating with a creature she has charmed. The two don't even need to be on the same plane of existence.
Shapechanger. The lilitu can use her action to polymorph into a Small or Medium humanoid, or back into her true form. Without wings, the lilitu loses her flying speed. Other than her size and speed, her statistics are the same in each form. Any equipment she is wearing or carrying isn't transformed. The lilitu reverts to her true form if she dies.
Multiattack. The lilitu can use her Captivating Presence. She then makes two weapon attacks.
Scourge. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage plus 9 (2d8) poison damage.
Captivating Presence. Each humanoid of the lilitu's choice within 30 feet of her that she can see must succeed on a DC 19 Wisdom saving throw or become charmed by the lilitu for 24 hours. Charmed targets regard the lilitu as their true love, or at least the object of a powerful and uncontrollable feeling of lust, and they obey the lilitu's verbal or telepathic commands. If a target suffers harm or receives a suicidal command, it can repeat the saving throw, ending the effect on a success. If a target successfully saves against this effect, or the effect ends for it, the target is immune to the lilitu's Captivating Presence for the next 24 hours.
Draining Kiss. The lilitu kisses a creature charmed by it or a willing creature. The target must make a DC 19 Constitution saving throw against this magic, taking 41 (6d10 + 8) psychic damage on a failed save, or half as much damage on a successful one. The target's hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.
Etherealness. The lilitu magically enters the Ethereal Plane from the Material Plane, or vice versa.