Cassetti

Bloodlust. Cassetti has advantage on attack rolls against bleeding targets. Whenever he hits a bleeding target with an attack, he restores 1d4 hit points to himself (increasing for each stack of bleed). 

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

Self-Preservation. Upon falling to 0 HP, instead of dying or falling unconscious, Cassetti can instead choose to sacrifice any vampire spawn under his control. Doing so restores half of his hit point maximum (that could not be reduced or prevented in any way), frees him from any conditions afflicting him, and instantly destroys the vampire spawn without leaving a body behind. For the next minute, his attacks deal an additional 1 necrotic damage, increasing with each vampire spawn that he sacrificed to heal himself with. 

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

Spider Climb. Cassetti can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Multiattack. Cassetti makes two attacks, only one of which can be a bite attack. 

Unarmed Strike. Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 1d8 + 4 bludgeoning damage. Instead of dealing damage, the vampire can grapple the target (escape DC 18).

Bite  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: 1d6 + 4 piercing damage plus 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.

Glaive. Melee Weapon Attack: +9 to hit, reach 10 ft., one creature. Hit: 1d10 + 4 slashing damage and 1d6 necrotic damage. On hit, the target creature must make a DC 17 Constitution saving throw or start bleeding for 1d4 necrotic damage at the start of each of its turns for the next minute. This bleeding effect can stack, and all applications of bleeding can be removed by succeeding a DC 13 Wisdom (Medicine) check.

The Prince's Retinue (1/Day). Cassetti magically heals any slain vampire spawn under his control within 120 feet of him. They are healed by half of their hit point total, unless they have been slain. Slain vampire spawn revive at half of their total hit point total (rounded up) and may retake their positions in initiative, or act at the end of initiative if they have not yet rolled for it. If they did not retake their positions in initiative, they may roll for initiative as normal. If a revived vampire spawn has a Sanguine Gift, they instead revive at 4/5s of their hit point total. Affected vampire spawn are under the effects of Bless for an hour. 

The Parade's Tempest (Recharge 5-6). Each creature within 30 feet of Cassetti must make a DC 17 Dexterity saving throw or take 4d6 slashing damage and 4d6 necrotic damage on a failure as he channels his hemomancy into his glaive and whirls up a storm around him. Additionally, he restores 1d4 + 4 hit points for each creature who failed the saving throw against the tempest. 

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.

Move. The vampire moves up to its speed without provoking opportunity attacks.

Glaive. The vampire makes one glaive attack.

Incite. The vampire forces an ally it can see within 60 feet to use its reaction to move up to its movement speed and make an attack roll against an enemy.

Bite (Costs 2 Actions). The vampire makes one bite attack.