Born the first and final child of late donkey farmers in Urai, Ambrose grew up isolated, a victim of mental disturbance from birth. Raised as mentally disabled and physically useful, he lived with and maintained a complicated relationship with his parents, living in the mundane grip of rurality until his 120s. Eventually, though, the temptations of the ancient and eldritch being Yigtha drew him from the cocoon of his youth.

Yigtha bestowed upon him new and eternal life, injecting part herself into his body and shifting the very essence of his being. His body and Yigtha's are distinguishable only by physical distance; he harbors her power within his elven form, possessed of magical and psionic abilities that draw from her directly. He is her chosen, but what this could possibly portend is as unknowable as Yigtha herself.

After a variety of adventures and a stint in a guild of warlocks, Ambrose retreated to a cave a few miles' hike from his childhood home, returning to his precious solitude for years until hearing tell of Tyr's Primarch, Alexios Seljeva, putting out a call for warlocks.