Once a renegade mage, Gregorius was captured after losing a duel to Zerren von Nachstein. Kael von Nachstein embraced him when he found use for him in the dungeons of Dawnstadt as an aid in his experiments.

In his mortal life, Gregorius Umbra was an avid scholar with an insatiable curiosity for the arcane and the unknown. Born into a family of scholars, he dedicated himself to the pursuit of knowledge, delving into ancient tomes, deciphering forgotten languages, and exploring the realms of magic. Gregorius developed a reputation for his intelligence and insatiable thirst for unraveling the mysteries that lay hidden in the shadows.
 
His obsession with the occult and ancient artifacts led him down a path that intersected with the supernatural world. Intrigued by the powers that lurked beyond mortal understanding, Gregorius sought forbidden knowledge, pushing the boundaries of what was deemed acceptable within scholarly circles. His relentless pursuit eventually drew the attention of Zerren von Nachstein.
 
Zerren and Gregorius faught, but in the end, Gregorius was ultimately defeated. Gregorious was thrown in the dungeons under Nachstein Citadel, but was eventually chosen for an embrace by Kael von Nachstein.