Count Dracula, Lord of Castlevania (Mythic)

Shapechanger. If Dracula isn't in sunlight or running water, it can use its action to polymorph into a Tiny or Hugebat or a Medium cloud of mist, or back into its true form.

While in bat form, Dracula can't speak, its walking speed is 5 feet, and it has a flying speed of 30 feet. Its statistics, other than its size and speed, are unchanged. Anything it is wearing transforms with it, but nothing it is carrying does. It reverts to its true form if it dies.

While in mist form, Dracula can't take any actions, speak, or manipulate objects. It is weightless, has a flying speed of 20 feet, can hover, and can enter a hostile creature's space and stop there. In addition, if air can pass through a space, the mist can do so without squeezing,  It has advantage on Strength, Dexterity, and Constitution saving throws, and it is immune to all damage, except the damage it takes from sunlight.

Legendary Resistance (5/Encounter). If Dracula fails a saving throw, he can choose to succeed instead. he cannot use this trait if the savings throw is an attack from the vampire killer

Spider Climb. Dracula can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. though he rarely does, preferring to teleport instead of any normal means of transportation

Vampire Weaknesses. Dracula has the following flaws:

Sunlight Hypersensitivity. Dracula takes 20 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack rolls and ability checks.

Nemesis of the Belmont Clan.  Dracula's resistances  and immunites are all nullified and his armor class  is counted as 15 when he is hit by the Vampire Killer 

The Curse of Dracula. whenever Dracula is killed, he will resurrect and return 100 years later and his castle with him.

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

Unarmed Strike (Vampire Form Only). Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 8 (1d10 + 5) bludgeoning damage. Instead of dealing damage, Dracula can grapple the target (escape DC 18).

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 (1d10 + 5) 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. Dracula targets one humanoid it can see within 30 feet of it. If the target can see Dracula, the target must succeed on a DC 17 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 Dracula or Dracula's allies 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 Dracula is destroyed, is on a different plane of existence than the target, or takes a bonus action to end the effect.

Children of the Night (10/Day). Dracula magically calls 2d4 swarms of bats or rats (swarm of bats, swarm of rats), provided that the sun isn't up. While outdoors, Dracula can call 3d6 wolves (wolf) instead. The called creatures arrive in 1d4 rounds, acting as allies of the vampire and obeying its spoken commands. The beasts remain for 1 hour, until the vampire dies, or until Dracula dismisses them as a bonus action.

Hellfire. Magical ranged attack Dracula unleashes at least 3 fire bolts in a spread that do 2d10 fire and necrotic damage per bolt that hits. 

Dark inferno.  magical ranged attack. Dracula manifests up to 3 flaming meteor spheres with a range of 30ft that he can guide at will that does 6d6 necrotic and fire damage each.

Teleport. Dracula magically teleport, along with any equipment he is wearing or carrying, up to 120 feet to an unoccupied space he can see.

Mist Dodge. when hit by an attack,Dracula may spend 5 legendary actions to phase through the attack via his mist form,avoiding all damage except for damage done by spells and weapons that deal radiant damage.

Curse of Darkness. once per round, when damaged by a critical hit, a radiant attack or an attack from the Vampire killer, Dracula may curse one target. the target must make a DC 15 Willpower savings Throw. if it fails, it takes 1d10 necrotic damage and is Paralyzed until the beginning of the next round.  If the Target Wields the Vampire Killer, then the DC is 10

Dracula can take 10 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. Dracula regains spent legendary actions at the start of its turn. 

Fatal Ray. (Costs 2 actions). Dracula summons seven green rays of dark energy that fly upward from his body. After a moment, the rays fall and do 2d10 necrotic damage. those who are hit  must make a constitution savings Throw or be poisoned until the beginning of the next round.

Dark Metamorphosis.  (costs 2 actions). when Dracula bites his opponent or uses Soul Steal, he may choose to use this legendary action to double the amount of health recovered

Dracula can take 5 Mythic actions, choosing from the options below. Only one Mythic action option can be used at a time and only at the end of another creature's turn. Dracula regains spent Mythic actions at the start of its turn. 

Final Form (Mythic; Recharges after a Short or Long Rest).  When Dracula is Reduced to 0, he takes on his second form as a huge monster (stats will be posted alongside this profile)

Soul Steal. (costs 3 actions) Dracula Uses his Dark Magic and siphons the souls of all around him, those within 60 ft. take 6d6 Necrotic damage and recover HP equal to the amount of damage done. Dracula may spend an additional 2 actions to double the range and increase the damage to  6d10

Demonic Meggido.(Mythic, costs 5 actions and can only be used once per encounter) Dracula forfeits his next turn to charge an explosion of darkness.  if he is hit by an attack with the vampire killer, the charge is interrupted and the attack is lost and wasted. the turn after, he unleashes an explosion with a radius of 60 ft that does 10d20 Necrotic and Fire damage to all inside the radius. he doesn't use this attack if his opponent wields the vampire killer because the attack takes a long time to charge and is easy to interrupt.