The Big Battle of Sanctuary! Athena's Greatest Crisis

Andromeda manages to defeat his foes, and finally the knights take off to the sanctuary. During the flight, Saori reveals that there are twelve gold knights, and that Ares might be one of them. Aioria arrives at Ares' throne room and unmasks the truth about his brother and Ares himself. A ferocious battle between them begins, but it's interrupted by another Gold Knight, Shaka of Virgo. Shaka challenges Aioria and they end up defeating each other. Saori and the Bronze Knights arrive at the sanctuary and are told by an unknown man about the twelve mansions, and that each of them are guarded by a Gold Knight. However, when they try to get to Aries mansion, the man shows his true identity and hit Saori with a gold arrow.

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S01E42 - The Ultimate Cosmo! Seven Senses