Praeteris

Praeteris is the mysterious figure who is apparently responsible for Factus Formis, as well as the assumed husband of Stelli'Aris. According to Factus, he is the ruler of the Vel'Kari. 
The Luminaire has labeled him "The Enemy of Divinity", claiming that he severed the Divine Connection, preventing the Gods from walking among mortals. The validity of this statement is unknown.
Kasdri Valmorn claims to have seen a vision in which he say Praeteris kill Cephelia Lofthaven using white lightning of some kind. Factus seemed to express doubt in this, dubbing the attack "Sleepy Lightning".
Praeteris has shown great power, taking the form of a being of wispy white wind and energy, granting spells and other abilities to people including Kasdri Valmorn.
He initially made Arabella Whitby aware of the Vestiges many years ago, via means of Kasdris Plaque. He has since entrusted Kasdri to the task of collecting them, and by the extension given the task to the rest of Group Alpha. It is not known why he wishes them collected, or why he constructed The Purifier.
Finding Praeteris