The Devil's Disciples

It's a race against time as Lucifer's highest council must come together and deal with an ancient prophecy that threatens Lucifer's reign. A threat that is feared to be a descendant of the ancient Seraphim. A powerful, fallen angel with wings of fire. But the prophecy is written in form of a riddle. Is this Seraph the enemy of Lucifer or a loyal defender of Lucifer? A defender against who or what?