Name: Dark Angel Wing
Effect: Sephiroth has a dark colored wing seemingly matching what humans suspect that angels have as wings on his right shoulder. This allows Sephiroth to move at a faster speed due to the ability of flight. Many at first would laugh and say that it's a pointless transformation as you cannot fly with one wing. However Sephiroth has superior strength and with that he is able to take flight, even with one wing.
Element: Wind/Air?
History: As a being from Project S, the Jenova cells that were implanted into him while he was still within his mother's womb affected his physical abilities. This had also gave him a wing. Making him that much closer to godhood.