Your Intelligence, Wisdom, and Charisma scores each increase by 1. Your Strength, Dexterity, and Constitution scores are 18.

Though humans reach adulthood in their late teens and live less than a century, human vampires are immortal and thus may be any age.

Your alignment is lawful evil until your vampirism is reverted by a wish spell or you are killed and brought back to life.

Humans vary widely in height and build, from barely 5 feet to well over 6 feet tall. Regardless of your position in that range, your size is Medium.

Your base walking speed is 30 feet.

You can speak, read, and write Common and one extra language of your choice. Humans typically learn the languages of other peoples they deal with, including obscure dialects. They are fond of sprinkling their speech with words borrowed from other tongues: Orc curses, Elvish musical expressions, Dwarvish military phrases, and so on.

You are resistant to necrotic damage and nonmagical bludgeoning, piercing, and slashing damage.

You can see in dim light within 120 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

If you aren’t in sunlight or running water, you can use your action to polymorph into a Tiny bat or a Medium cloud of mist, or back into your true form.

While in bat form, you can’t speak, your walking speed is 5 feet, and you have a flying speed of 30 feet. Your statistics, other than your size and speed, are unchanged. Anything you are wearing transforms with you, but nothing you are carrying does. You revert to your true form if you die.

While in mist form, you can’t take any actions, speak, or manipulate objects. You are weightless, have 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, you can do so without squeezing, and you can’t pass through water. You have advantage on Strength, Dexterity, and Constitution saving throws, and you are immune to all nonmagical damage, except the damage you take from sunlight.

If you fail a saving throw, you can choose to succeed instead. You can use this trait three times and regain the ability to do so when you finish a long rest.

When you drop to 0 hit points outside your resting place, you transform into a cloud of mist (as in the Shapechanger trait) instead of falling unconscious, provided that you aren't in sunlight or running water. If you can’t transform, you are destroyed.

While you have 0 hit points in mist form, you can’t revert to your vampire form, and you must reach your resting place within 2 hours or be destroyed. Once in your resting place, you revert to your vampire form. You are then paralyzed until you regain at least 1 hit point. After spending 1 hour in your resting place with 0 hit points, you regain 1 hit point.

You regain 20 hit points at the start of your turn if you have at least 1 hit point and aren't in sunlight or running water. If you take radiant damage or damage from holy water, this trait doesn’t function at the start of your next turn.

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

You have the following flaws:

Forbiddance. You can’t enter a residence without an invitation from one of the occupants.

Harmed by Running Water. You take 20 acid damage if you ends your turn in running water.

Stake to the Heart. If a piercing weapon made of wood is driven into your heart while you are incapacitated in your resting place, you are paralyzed until the stake is removed.

Sunlight Hypersensitivity. You take 20 radiant damage when you start your turn in sunlight. While in sunlight, you have disadvantage on attack rolls and ability checks.

When you make an unarmed strike while in your vampire form, you deal 1d8 bludgeoning damage and you can grapple the target of your attack. The target's DC for escaping the grapple is equal to 8 + your proficiency bonus + your Strength bonus.

Your bite is an natural weapon. You can target a willing creature, or an unwilling creature who you are grappling, who is incapacitated, or who is restrained with this bite when you are in your vampire or bat form. On a hit, you deal 1d6 piercing damage and 3d6 necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and you regain 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 your control.

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

Each time you or your 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 you are destroyed, are on a different plane of existence than the target, or take a bonus action to end the effect.

The DC for the saving throw is equal to 8 + your proficiency bonus + your Charisma modifier.

As an action, you magically call 2d4 swarms of bats or rats, provided that the sun isn’t up. While outdoors, you can call 3d6 wolves instead. The called creatures arrive in 1d4 rounds, acting as your allies and obeying your spoken commands. The beasts remain for 1 hour, until you die, or until you dismiss them as a bonus action.