Moon Edge Style

After getting his shoulder bitten off, Ren already lost consciousness. Usually, the other incarnations wouldn't care if the current incarnation dies in battle, but it's a different matter altogether if it's against the ORIGIN. Even if it's just one of its seeds, they can never lose to the ORIGIN.

So after Ren lost consciousness Edge Regius took over Ren's body. Among all the incarnations who have too overpowered techniques hat Ren's current body can't handle, Edge's style was created so that even the weak could use the sword to become powerful.

...

After cutting one of Fean's arms, Edge started to assess the current condition of Ren's body. The right shoulder was still working but the rotation was not to his liking. The left leg was experiencing severe muscle trauma that could slow down his movement. A few ribs have been broken and the lungs were being squeezed by some of the broken ribs.