The Saints of Ragnarok (Saint Seiya x ROR)

Mortals from another world are summoned by Brunhilde to fight the Gods. Unbeknownst to the gods, these are not just any normal mortals. They are the Saints, mortals with the power to harness the energy of the cosmos itself-warriors who have fought and defeated gods before. Each Saint is a legendary fighter, clad in powerful armor known as Cloths that draw strength from the constellations. Led by Pegasus Seiya, the Saints are summoned to Valhalla by Brunhilde as humanity's last hope, challenging the gods' decree of annihilation. With their unparalleled skills and unbreakable spirit, the Saints join the battle of Ragnarok, facing off against divine champions to prove that humanity is not only worthy of survival but capable of defying even the mightiest gods.

Saint Seiya x Shuumatsu no Valkyrie (Record of Ragnarok) crossover.