Dark Legacy

Dark Legacy is a tool which was created and discarded by Heaven Canceler at some point in his past. It is able to rapidly rebuild the human body no matter how badly it is damaged. The device is currently being used by Aleister Crowley to preserve the Dark Matter ability of the #2 Level 5 esper Kakine Teitoku by keeping his brain alive. It was also used to save Mugino Shizuri's life, preventing her from dying after her arm was blown off by her own ability, her eye being stabbed out, and sustaining multiple gunshot wounds after her fight with Hamazura Shiage.