Levitation: He can float/fly at will, regardless of what form he's in

Vampire: He can drink blood to heal/feed

Shapeshifting: He can change form on a whim, but it takes concentration to stay that way. If it's disrupted, he goes back to his true form

Darkvision: Sees better in the dark then he does in light

Limb regeneration: If given enough time, and enough blood, he can grow back missing body parts

Magic theft: Can drink blood of magical beings to temporarily copy their powers. This makes him very unstable, and his body will eventually, violently, eject the powers out of him.

Psychic control: Can hold creatures in place with his mind, as long as he stares them in the eyes.

Thrall: If he completely drains the blood out of a living creature, it becomes a zombie under his control. He can choose to make humanoids a vampire instead, but they would be released from his control.