Aquarion Evol Temporada 1 Episódio 7

After a small accident, tension arise between Sirius and Apollo. Later on, a Mythological Beast attacks Memphis, and Sirius, Silvia and Sirius head out to counterattack. However, it sends out a bright light which causes each of them to experience short, painful flashbacks. When they then try to unificate, they end up trying to kill each other.