Ep. 10: Shirō, Rin, and Saber plan to destroy the Holy Grail at Ryuudou Temple to defeat Gilgamesh.

Returning to Shirō's home, he, Rin, and Saber decide to avenge Emiya and stop Gilgamesh by destroying the Holy Grail. Rin uses familiar spirits to deduce the summoning location is Ryuudou Temple, identifying Shinji as the likely substitute vessel since Illysaviel was intended to become the Lesser Grail. To counter Gilgamesh, Rin realizes Shirō must master Unlimited Blade Works, as Emiya was the only one who could perfectly oppose him. Lacking sufficient mana, Rin performs a ritual to implant her Magic Crest into Shirō, allowing them to share mana storage. During this process, Shirō inadvertently accesses Rin's memories, causing her embarrassment. Later, Shirō finds Saber exploring his house, where she thanks him for guiding her toward her dream and extracts a promise that he and Rin will survive the Holy Grail War. Meanwhile, Gilgamesh completes transporting Shinji to Ryuudou Temple, successfully summoning the Holy Grail.

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