Fate/Origins. Volume 3.

The arbiter of the Fourth Battle announced a hunt for Caster, but the participants are in no rush to eliminate the servant. Taking advantage of the opportunity, first Kaynet attacks the Ainzbern castle, and then, wishing to meet Kiritsugu, Kirei... Kotomine also joins. The servants and their summoners desperately want to win and overthrow their opponents. Who will survive these clashes? Fate/Zero tells the story of the Fourth Holy Grail War, which took place ten years before the events of the cult game Fate/stay night. Everyone knows that it was the catastrophe of the Fourth Battle that led to the premature beginning of the Fifth. But what really happened there? The renowned screenwriter Gen Urobuchi, an unparalleled master of thrilling storylines, lifts the veil on the dark secrets of the past.