Long ago, a war between the Angels and the Demons broke out and it was known to the inhabitants of Vectus Mundus as "The Siege of Heaven". The demons manipulated and brainwashed the humans to join them in the battle against Heaven and the Angels, driven by an insatiable thirst for supremacy and dominion over all.
Achieving notable triumph, the demons effectively garnered human followers for their purpose. This resulted in complete chaos, turning the old world upside down, and shaking the very roots and core of the humans as God's creation.
In response, Heaven's wrath befell these insurgent humans, turning them into vampires and werewolves, a permanent punishment and transformation with repercussions extending not solely to the individuals themselves, but will stem down to their future bloodline.