S01E18 — Decisive Battle

Shirou, Saber and Rin are at the steps to the temple.Assassin appears, he lets Shirou and Rin go past and fights Saber. Shirou and Rin head past Assassin and past him they see Sakura, in rather odd cloths who is in what seems to be pain as she is glowing red. She is in a pit arena area and as they prepare to go down there they are attacked from behind which Shirou notices and blocks the attack with Archer's swords. Souichirou appears and Shirou tells Rin to go ahead as he fights Souichirou and she goes to rescue Sakura. Meanwhile Saber and Assassin fight continues on. They compliment each other on being one of the best swordsmen they have ever faced and Assassin tells Saber that his identity, Sasaki Kojirou doesn't really exist. He is fabricated from people's minds of being a great swordsman so he is a fictional heroic soul. He says he has no desire for the Holy Grail therefore; his true desire is this, a fight with a worthy opponent.We find out more on the past of Rin & Sakura and how they once were bestfriends. Caster is watching this smiling says she just needs one magician for the sacrifice. Everything seems to be going as she had planned.