Nester

Nester was once one of Halaster Blackcloak's apprentices. Nester tried to become a lich and succeeded...in part. He attained undead status, but he badly bungled his spells. He became a lich, in form, but gained slightly different powers. His phylactery disintegrated, his body following slowly. Nester now appears as a green-glowing, floating skull and skeletal arms.