Rise of the Witnesses
From Super-wiki
The Rise of the Witness is a sign of the appocolypse. One of 66 Seals that when broken will unlock,and open the "door" that Lucifer is sealed in. The Witnesses are people who have seen or died at the hands of supernatural beings (I.E. Demons.) And can be known by the brand of a symbol on their hands. Once summoned by the proper spells they arent much more than basic spirits other than having a spacific person(s) to kill. Once identified they can be bannished by a spell.