Children Of The Light
With the Holy Trinity no more, vampires could no longer control themselves around humans. It left them thirsty and scorned, so they went on a rampage, forcing the Angels to subdue more than half of their species. As it stands, they were at the brink of extinction.
Babylon was like a ghost town buried beneath the earth along with everyone else the angels deemed unworthy of their mercy. They were one Vampire king who had sold his soul, Greed. One undead commander who had cheated The Gospel on multiple occasions, Solomon. One human traitor who conspired with them rather than side with the angels, Tia. And one spell caster responsible for damning souls of thousands to save his own, Merlin. The only source of light in the dark cave like structure was the glowing crystal sticking out of the ceiling.