Xolaani, the Bloodletter

Darkin Resilience. Xolaani regains 20 hit points at the start of her turn if she has at least 1 hit point and isn’t in sunlight.

Blood Magic Infusion. Xolaani’s sickle attacks deal an additional 1d8 necrotic damage, and when she reduces a creature to 0 hit points, she gains 10 temporary hit points.

Evasion. When Xolaani is subjected to an effect that allows her to make a Dexterity saving throw to take only half damage, she instead takes no damage if she succeeds on the saving throw, and only half damage if she fails.

Legendary Resistance (3/Day). If Xolaani fails a saving throw, she can choose to succeed instead.

Multiattack. Xolaani makes three attacks with her Void-Touched Sickles.

Void-Touched Sickles. Melee Weapon Attack: +13 to hit, reach 10 ft., one target.
Hit: 13 (1d10 + 7) slashing damage + 9 (2d8) necrotic damage.

Blood Nova (Recharge 5–6). Xolaani releases a pulse of blood magic in a 30-foot radius. Each creature in the area must make a DC 18 Constitution saving throw, taking 36 (8d8) necrotic damage on a failed save, or half as much damage on a successful one. Xolaani regains hit points equal to half the damage dealt to all creatures.

Shadow Step. As a bonus action, Xolaani teleports up to 60 feet to an unoccupied space she can see. She has advantage on her first melee attack after using this ability.

Xolaani can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature’s turn. Xolaani regains spent legendary actions at the start of her turn.

Attack. Xolaani makes one sickle attack.

Shadow Dodge (Costs 2 Actions). Xolaani can move up to her speed without provoking opportunity attacks.

Soul Reap (Costs 3 Actions). Xolaani targets one creature she can see within 30 feet of her. The target must succeed on a DC 18 Dexterity saving throw or take 22 (4d10) necrotic damage, and Xolaani regains hit points equal to half the damage dealt.