Estonius

The lich king a human cursed immortality and be brought back to life every 31 years starting upon his death after all his magic is retrieved as his soul is powered and tethered by his magic. 400 years later the lich king found the door and left the tomb while, A 19 year old woman from a parallel world is stabbed by a serial killer and as she was still wounded after the world jump and died while an hour later the lich king resurrected her and made her an annoying companion.