Regeneration. Vladimir regains 10 hit points at the start of his turn. If he takes fire or radiant damage, this trait doesn't function at the start of his next turn. Vladimir's body is destroyed only if he starts his turn with 0 hit points and doesn't regenerate.

Turn Immunity. Vladimir is immune to effects that turn undead.

Oathbind. If Vladimir would deal damage to a dying creature with his +2 greatsword, he can instead choose to stabilize that creature and subject it to the effects of a geas spell. This geas lasts until dispelled and can damage its bearer any number of times each day. A creature that takes damage in this way is also restrained until the start of its next turn. In addition, the geas can’t be ended or dispelled except through the effects of a greater restoration or wish spell, or if Vladimir uses an action to dismiss it.

Burning Hatred. When Vladimir is reduced to 0 hit points, black flames erupt along the hilt of his greatsword and the shadows encircling its blade become spiked black wires. His statistics are then instantly replaced by the statistics of his second form. His initiative count doesn't change, excess damage doesn't carry over to his new form, and he retains none of the conditions he had in his previous form.

Multiattack. Vladimir makes two attacks with his +2 greatsword. He can replace one of those attacks with one use of his conjure phantoms action.

Greatsword +2. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage, and Vladimir can push the target up to 5 ft. away. Instead of pushing the target, Vladimir can force the target to make a DC 18 Strength saving throw or be knocked prone.

Conjure Phantoms. Vladimir summons a pair of phantom warriors, which appear next to a hostile creature that Vladimir can see. Each warrior makes a spectral longsword attack (Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) force damage) against that creature, then disappears. A creature that takes damage in this way can’t regain hit points until the start of Vladimir’s next turn.

Reaving Sweep. Vladimir sweeps his greatsword in an arc with thunderous force, creating a shockwave that rips through a 15-foot cone in front of him. Each creature in that area must succeed on a DC 18 Constitution saving throw or take 21 (6d6) slashing damage and be pushed back 5 feet. A creature that succeeds on the saving throw takes half damage and isn’t pushed.

Umbral Snare. Black-spiked wires extrude from the earth around Vladimir in a 5-foot radius. Each creature in that area must succeed on a DC 18 Dexterity saving throw or take 14 (4d6) piercing damage and be grappled by the wires (escape DC 19) until the start of Vladimir’s next turn. A creature that succeeds on the saving throw takes half damage and isn’t grappled. A creature that attempts to escape the grapple immediately takes an additional 7 (2d6) piercing damage, whether it succeeds or fails.

Vladimir can take up to three reactions per round, but only one per turn. If Vladimir would lose his reactions, he loses one reaction instead.

Indomitable. Trigger: A hostile creature ends its turn. Effect: Vladimir can repeat the saving throw against one effect or condition currently affecting him. (This reaction has no effect if the effect or condition didn’t originally require it to fail a saving throw.)

Sworn Retribution (1/round). In response to taking damage from a creature he can see, Vladimir marks that creature until the end of his next turn. While that creature is marked, Vladimir doesn’t provoke opportunity attacks when moving directly toward it, he has advantage on the first melee attack he makes against that creature each turn and his weapon attacks against that creature score a critical hit on a roll of 19-20.

Ghostly Command. In response to taking damage from an attack or spell, Vladimir conjures a phantom soldier to shield him, reducing the damage taken by half (rounded up). This ability can’t reduce Vladimir’s damage taken by more than 10.

Martial Reprisal. In response to taking damage from an attack or spell, Vladimir moves up to half his speed toward the attacker or caster and makes an attack against it with his +2 greatsword if it's within reach.