Sekai no katasumi de kimi no na o (S03E10)

With Miyu swallowed by the Heroic Spirit, Illya seizes Ruby and Sapphire in each hand, transforming into her Zwei Form to draw Miyu out and slap her. She faces the greatest Heroic Spirit of all, who bears a sword that can rend the world. Prepared to sacrifice everything she has, Illya fights to save her precious friend, Miyu. What fate will her feelings lead to?! (Crunchyroll)