Power of the White Snake

The is a general term for Orochimaru's ability to heal any injuries and to turn into a giant white snake. This enables him to utilise Living Corpse Reincarnation on a victim when the time is right. The Power of the White Snake is conferred by the White Snake Sage of Ryūchi Cave, by biting a person and injecting them with its natural energy. Those who survive are deemed worthy of being taught Sage Mode. Aside from increased regeneration, Orochimaru can also reconnect his body with snakes should it be bisected, or if the injuries are too severe to heal, he can shed his skin to regurgitate a new body, free from all damage.

When he absorbed Orochimaru, Sasuke Uchiha temporarily acquired much of the White Snake's ability to heal faster than normal, as well as shedding his skin to escape the Amaterasu, though the latter feat took a toll on Sasuke's chakra reserves. Kabuto also obtained the ability by transfusing his master's genetic material into himself prior to Orochimaru's revival. Kabuto later travelled to Ryūchi Cave and studied under the White Snake Sage to attain Sage Mode, which Orochimaru had been unable to do.

Trivia

 * Though, Orochimaru did achieve Sage Mode, but, due to the fragility of his body and small reserves of chakra at the time being, he was forced to use his senjutsu chakra for the Cursed Seals.