- "Could we isolate and bind demonic power, it could enable us to conquer the world! And that is the wish of His Holiness!"
- ―Agnus[src]
The Ascension ceremony is a magical ritual created by the Order of the Sword. The "ascended" assume "angelic" appearance and powers, although in reality they merely become demons. It seems that the ritual can resurrect recently dead, as it was with Sanctus, although it is possible that he was brought barely alive and healed in the process instead of being resurrected. In Deadly Fortune novel it is said that whose who attempt the ritual but are too weak can turn into demons and lose their sanity.
Although this isn't mentioned directly, it is possible that the ritual was developed by Agnus himself, through research into the true Hell Gate and fragments of the "Dark Angel". The ritual is known to be used on Sanctus, Agnus, and Credo, and also on knights who became Alto Angelos.