A tale of vampires and angels: Demons rising

Thousands of years prior to the race of the humans, a realm undaunted by the prospects of humanity thrived amongst all other. Its two leading races- the vampires and the angels, relentlessly strove against each other for domination, subjecting the realm and all its kind to the bitter misery of hatred and war.
But now, the world has begun to crack away, and an unstoppable foe bent on the subjugation of the universe itself, has arisen from its slumber.

Can our unlikely heroes end this formidable power, or will their differences doom the fate of the world forever?