Demon Curing Ritual

The demon curing ritual is a ritual that can be used to cure a demon without any significant damage to the vessel. It has been performed successfully two times.

Procedure & Incantation
The procedure was originally invented by Father Max Thompson back in the 1950s. After 18 times failed, finally, he founded the proper formula to curing demons. It involved purifying the blood of a human. The demon is trapped in a devil's trap drawn on any consecrated ground. The purified blood is drawn into a syringe and plunged into the demon's neck eight times, once every hour. The ritual's effect is not instantaneous. Until the fourth hour, the demon is still the one in control. It was after the sixth dose that any change was visible. After the eighth dose, the person who perform the ritual has to recite an incantation, a variation of the exorcism incantation,

"Exorcizamus te, omnis immundus spiritus. Hanc animam redintegra, lustra! Lustra!".

His palm is slit and the palm is placed against the demon's mouth. White light engulfs the demon and a second later, the demon is cured. The demon becomes human again as a result. For an unknown reason, the last part of this ritual was not needed to cure Dean. Perhaps this is because of his special case, or perhaps he isn't fully cured.

After Effects
Although Father Max Thompson was a little weak from losing blood every hour, the after effects on Sam were worse as he was already quite weak, due to completing the first two trials. Every dose administered to Crowley, caused his arm to glow orange and caused him pain. As a result of Sam not finishing the ritual, Crowley did not become human again but did retain human emotions and an addiction to human blood.

Side Effects
If the treatments are terminated for a short while, as the demon being cured gets closer to human, devil's traps and consecrated ground lose their effect on them as do binding cuffs, allowing them to free themselves.

Known Users

 * Father Max Thompson (successfully cured the demon possessing Peter Kent)
 * Sam Winchester (unfinished, on Crowley, successful on Dean Winchester)

Appearances

 * Season 8
 * Clip Show
 * Sacrifice
 * Season 10
 * Reichenbach (mentioned)
 * Soul Survivor

Trivia

 * Some fans speculated that Sam might attempt to cure Dean in Season 10. However, the problem with that scenario is that the ritual might not work on a Knight of Hell with the Mark of Cain, such as Dean, since Dean (and Cain) are immune to rituals and weapons that work on normal demons. This theory is proven correct as Sam does cure Dean in "Soul Survivor." It works but he fights it, escapes briefly and tries to kill Sam before being recaptured by Castiel.