Code Geass: Lelouch of the Rebellion (2006)

S02E20 Emperor Dismissed

As the Emperor sets the stage for Ragnarok, Lelouch and Suzaku head to Kaminejima to confront him. Having shed his old hang-ups about wrong methods, Suzaku cuts a deal with Schneizel: become the Knight of One in exchange for assassinating the Emperor. Lelouch pushes his Geass to its limits, turning much of the Britannian forces on the island into pawns. Meanwhile, the Black Knights' leaders decide to declare Zero dead, knowing the truth is too bitter to reveal—though not everyone buys the story. Anya's mind is overtaken by Marianne, who restores C.C.'s memories, and the two begin executing their own agenda. At Kaminejima, Bismarck holds Suzaku at bay while Lelouch strides unopposed into the Sword of Akasha via the Thought Elevator. Unable to kill his father, he destroys the entrance, intending to seal them both inside for eternity.