Orochimaru's true form.
The Power of the White Snake (白蛇の力, Shirohebi no Chikara)[1] is a general term on Orochimaru's ability to heal any injuries, due to his years of experimentation on his own body to extend his lifespan and survival rate, which turned him into a giant white snake that enables him to utilise Living Corpse Reincarnation on a victim when the time is right. Aside from increased regeneration, Orochimaru can also reconnect his body with snakes should it be bisected,[2] or if the injuries are too severe to heal, he can shed his skin to regurgitate a new body, free from all damage.[3]
When Sasuke absorbed Orochimaru, he too gained much of the White Snake's ability to heal faster than normal,[4] as well as shedding his skin to escape the Amaterasu, though the latter feat took a toll on Sasuke's chakra reserves.[5] Kabuto also obtained the ability by transfusing his master's genetic material into himself prior to Orochimaru's revival.[6]