Tremere lich

Also called the Embalmed, the Tremere Liches are members of a left-handed legacy that originated from a clan of vampires. Legend has it that this strand of vampire made a deal with an abyssal entity of some sort, who taught them how to tap into the power of their victim's very soul, which would essentially allow the clan to become daywalkers if they acquired the souls of awakened kine. Unfortunately, the acamoth purposely hid a crucial detail to the ritual, bringing about the extinction of the clan, and the creation of a new but sinister legacy.

Trivia
The Tremere Liches are based off an arcane vampire clan originally from the classic World of Darkness and Ars Magica.