In Volume 18 (Assault), Muzan Kibutsuji finally makes his decisive move, launching a devastating attack on the Demon Slayer Corps headquarters. Chaos erupts as the Infinity Castle emerges, pulling the Demon Slayers into a shifting labyrinth controlled by powerful demons. The final arc begins with relentless intensity and shocking twists. Each Hashira is separated, forced to confront Upper Rank demons in isolated and deadly battles. The atmosphere grows darker and more desperate than ever before. Courage and sacrifice define every encounter. The scale of combat expands dramatically. Long-standing rivalries and alliances reach their boiling point. Tanjiro’s resolve hardens as he faces unimaginable odds. This volume sets the stage for the ultimate war between humans and demons.