S1·E87 The Gold Union! The Forbidden Mystery!

Fudo, Kiki, and Shiryu face off against Hyperion, allowing Athena, Seiya, and Harbinger to move forward. Hyperion's Destruction Tector and Tenchi Destruction Slash holy sword prove too powerful for the three Gold Saints' attacks on their own. In a final show of strength, they combine their Cosmo into a single forbidden attack: Athena Exclamation. The Saints and Pallasites throughout Pallasvelda react to the outpouring of Cosmo, and as the Tenchi Destruction Slash is destroyed, the three Saints' Cosmo vanishes.