Flames of Enlightenment
From The Stargate Omnipedia
A great chasm of fire where many, if not all of the Ori reside. To gaze upon the Flames is a gift and reward to loyal followers. Often when summoned to the Flames, one is transformed into a Prior.
KEY EPISODE
Origin - The Doci invites Daniel to witness the Flames of Enlightenment where he has his first encounter with the Ori.