There was a faction born that all creatures of the dark have known as the "cestrus dominae", which in the cestrus' language means, "time assassins". They were said to be born of the very fabric of time, created to watch over all in every century.
In 3069, five cestrus were derived from a rip in time as the end of the world was beginning.
One crawled from the murky depths of the ocean, the second rode in with the strongest wind, the third appeared amongst a tower of flames, the fourth struggled from the damp earth, and the fifth escaped across the river Styx.
They became the guardians of water, air, fire, earth, and spirit and each were bestowed a name for those in need to call upon them. Water became Metra, air became Gayl, fire became Sylis, earth became Desparta, spirit became Rasyl.
All began well, each element taking care of his or her own duty, but soon each fell away from their calling and into darkness.
Desparta was the first to fall, too consumed by his power to control mortals. Metra fell second, drawn down by the power of telopathy, using it to reveal secrets of the very minds who created her. Sylis lost control with Gayl as both converged powers to redeem what they felt was theirs and to claim lives. Rasyl was the strongest, but still was overwhelmed by her power to distinguish devil from angel and created her own beings.
Their creators could barely hold control over the cestrus, so they came together and decided upon an action, equal to the cestrus' cruelty and ruthlessness. They would lock each one in a mortal form and trap them each in a separate, solitary century, where none could reach one another. Neither would they be able to pass through various dimensions nor wield the power they once had.
So the creators secretly built a staff from the five elements and molded five gems out of the blackened sands from a sacred valley. Each element was called upon and told that the gems would increase their powers ten-fold if placed in the heart, and each element carelessly thrust their gem into their heart.
The creators laughed mercilessly as each element was sucked through a portal and sealed in different centuries. The staff was hidden deep in the earth in the century 3069 as the last of the world faded away, never to be retrieved.
Only one flaw remained in the creators' plan: the cestrus would never age nor die as normal mortals did and soon, as time passed, they each would meet again.