It is revealed that Caster has broken the standard rules of the Holy Grail War by summoning her own Servant, Assassin , to guard the Ryuudou Temple.
The episode is defined by the stark contrast between Shirou’s idealistic "hero of justice" mindset and Archer’s cold, utilitarian realism. Fate Stay Night Episode 7
While Archer fights Caster, Saber faces Assassin at the temple gates. She is nearly killed by his secret technique, Tsubame Gaeshi (Swallow Reversal)—an incredible skill that strikes from three dimensions simultaneously through pure martial mastery rather than magical power. It is revealed that Caster has broken the
This disagreement leads Archer to literally stab Shirou in the back, attempting to kill him to eliminate what he views as a dangerous, naive ideology. Key Servant Encounters She is nearly killed by his secret technique,
Realizing his current weakness after the encounter with Archer, Shirou finally asks Saber to train him in swordsmanship so he can defend his own ideals.
Fate/stay night [Unlimited Blade Works] Episode 7 Discussion