Volenta Popofsky, Third Bride of Strahd

Legendary Resistance (1/Day). If the vampire fails a saving throw, it can choose to succeed instead.

Regeneration. The vampire regains 20 hit points at the start of its turn if it has at least 1 hit point and isn’t in sunlight or running water. If the vampire takes radiant damage or damage from holy water, this trait doesn’t function at the start of the vampire’s next turn.

Multiattack. (Vampire Form Only). The vampire makes two attacks, only one of which can be a bite attack.

Great Knife (Vampire Form Only). Melee Weapon Attack: +10 to hit, reach 5 ft., one creature. Hit: 10 (1d10 + 5) piercing damage. The target is considered grappled by the vampire as long as the dagger remains stuck (escape DC 20).

Bite. (Bat or Vampire Form Only). Melee Weapon Attack: +9 to hit, reach 5 ft., one willing creature, or a creature that is grappled by the vampire, incapacitated, or restrained. Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. A humanoid slain in this way and then buried in the ground rises the following night as a vampire spawn under the vampire’s control.

Charm. The vampire targets one humanoid it can see within 30 feet of it. If the target can see the vampire, the target must succeed on a DC 15 Wisdom saving throw against this magic or be charmed by the vampire. The charmed target regards the vampire as a trusted friend to be heeded and protected. Although the target isn’t under the vampire’s control, it takes the vampire’s requests or actions in the most favorable way it can, and it is a willing target for the vampire’s bite attack.

Each time the vampire or the vampire’s companions do anything harmful to the target, it can repeat the saving throw, ending the effect on itself on a success. Otherwise, the effect lasts 24 hours or until the vampire is destroyed, is on a different plane of existence than the target, or takes a bonus action to end the effect.

Throwing Knife (Vampire Form Only). Ranged Weapon Attack: +10 to hit, ranged 20/60 ft., one target. Hit: 8 (1d6 + 5) piercing damage.

Volenta Popofsky gains an additional reaction per round the first time she goes below half of her total health (72). More Blood then replaces Riposte as her reaction.

Riposte (Phase 1). Volenta will use her iron fan to deflect an incoming melee weapon attack (increasing her AC by +2 against that attack), and will counter-attack with her Great Knife.

More Blood (Phase 2). If Volenta is hurt by a melee weapon attack, she will counter-attack with her Great Knife at advantage, if the attack hits, roll an additional d10 when calculating damage.

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

Fan of Knives (Costs 2 Actions). The vampire targets up to three ennemies in front of her with her throwing knife attack, she then shapeshifts into her mist form.

Great Knife. The vampire shapeshifts back to vampire form and makes a Great Knife attack.

Bite. The vampire makes a Bite attack.