Fate Stay Night Skylight Aura

An epilogue of Fate Stay Night Unlimited Blade Works. Gilgamesh & The Grail didn't end as Shirou & Rin thought. Instead they used each other's essence to heal: the Grail, it's wound from Saber; Gilgamesh, regenerating his mortal arm. War will soon begin again. Will the participants be able to stop the Grail & who it holds inside, or will the past repeat? OC x Lancer Shirou x Saber