From the dawn of creation, the Council has maintained balance throughout existence. Carrying out their orders are the Horsemen, Nephilim (powerful beings created from the unnatural union of angels and demons) who have bonded with the Council and gained immense powers.
But these powers came with a tragic cost: the Horsemen were ordered to use their newfound powers to exterminate the rest of their species. What followed was a bloody battle in Eden where the Horsemen, following the Council's will, destroyed the Nephilim.