Gather Friends! Köga's Overflowing Cosmo!.After infusing the Darkness Cosmo in Köga's body, Amor finds out that he was betrayed by his sister from the beginning and swears to kill everyone including her, knocking out Eden in the process. Meanwhile on Earth, Kiki, Harbinger, Fudö, and Genbu use their Cosmos to send Köga's friends to Mars. As he finally reunites with Saori, Köga is overcome by the Darkness Cosmo and possessed by the God of Darkness, Abzu, who kills Amor in one single blow. As the possessed Köga now proceeds to kill Athena with his own hands, his friends try to have him return to his senses without success, until Eden stands in his way.