Fate/Zero

After Tokiomi hears from Kirei about Risei's unexpected death, Archer believes that Kirei is furious upon missing his chance to be the one to murder his own father. Irisviel and Saber, being informed by Maiya, head to the church to discuss with Tokiomi his proposal to form an alliance. Tokiomi visits his daughter Rin, giving her a magus book and some wisdom before going to the church. During the meeting, Tokiomi suggests a temporary alliance to defeat the other Masters first. Irisviel agrees, provided that Tokiomi complies to having Kirei leave the city and be no longer involved in the war. As they depart, Irisviel reveals to Maiya that she is the embodiment of the Holy Grail in human form and will soon die to create the Grail near the end of the war. Maiya promises to protect her until that time comes. Meanwhile, Kirei reveals to Archer that his father's dying act was to leave Kirei the remaining Command Seals, restoring Kirei's ability to contract with a Servant. The secret reason behind the war is that the Holy Grail can be activated only if all seven Servants are sacrificed. Tokiomi has been reluctant to use his Command Seals, as he needs at least one to force Archer to commit suicide. Furthermore, Kirei still wants to explore his dark desires, and Archer yearns for a more stimulating Master. Later, Kirei meets with Tokiomi, who entrusts him with the guardianship of Rin should anything happen to him and an Azoth dagger as a symbol of his completed apprenticeship. Kirei stabs Tokiomi in the back with the dagger, saying even his own father and master never really understood him. With Tokiomi dead, Kirei and Archer form a new contract as Master and Servant.