House Vol possessed the Mark of Death. Though scholars have debated as to the actual power wielded by a member of House Vol, it was no doubt terrible in scope and power. House Vol was wiped out by a union of dragons and elves who saw the house as an abomination. However, not every member was destroyed. In the final days of House Vol young Erandis Vol was transformed into a lich by her mother in order to protect her. Lady Vol now oversees the Blood of Vol, manipulating lesser people in an effort to restore the lost Mark of Death.
It should be noted that since the House was destroyed before the introduction of the d' prefix, no one who bore this mark would be called d'Vol.