Resurrection Charm

The Resurrection Charm is casket of powerful magic that is sewn into a person's body. Once the spell senses the life-force of the individual ebbing, the magic kicks in as a purple glow and works its way through the body, repairing and resurrecting the individual. The resurrection and healing power of the spell is not instantaneous, however; the more severe the death, the longer the body will take to recuperate.

Episodes

11.18 Hell's Angel

While healing Amara, Rowena reveals to her that after Lucifer snapped her neck, a casket of powerful magic she had sewn into her thigh was activated once her life-force began ebbing. As the magic worked it's way through her body, it repaired her broken neck, bringing her back to life.

13.07 War of the Worlds

After being found out by the Winchesters, Arthur Ketch tells the brothers how he came to still be alive after being shot in the head. Years ago the British Men of Letters captured Rowena, and that during her interrogation, Ketch learned of the resurrection charm. He would strike a deal with Rowena, sewing the charm into his body in exchange for letting her escape. Resurrecting soon after his body was dumped, Ketch went into hiding, as the British Men of Letters frown on desertion, he began searching for Rowena, explaining that once the charm is used, it must be recharged or risk permanent death.

13.12 Various & Sundry Villains

Rowena tells the Winchesters that after Lucifer burned her alive, the healing process took a long time. Rather than risk being murdered by Lucifer again, and going through the process, Rowena is seeking the Black Grimoire to lift the bindings placed on her by the Grand Coven.