Poseidon Arc

Poseidon, the Emperor of the Seas, awakens in the body of Julian Solo, abducts Saori, and traps her in his undersea Sanctuary. The Bronze Saints must defeat his seven Marina Generals and shatter the Main Breadwinner pillar before the world floods.

The Poseidon Arc shifts the cosmology of [Saint Seiya](/manga-series/saint-seiya) outward. Where the Sanctuary arc was a vertical assault on a corrupted human institution, this arc opens onto a properly mythological scale: a god of the sea has woken into the body of the wealthy Julian Solo and intends to wash away a humanity he considers irredeemable. Athena, choosing not to abandon the world, allows herself to be captured to act as a living seal on the rising waters of his temple. Structurally the arc rhymes with the Twelve Houses but inverts its geometry. Instead of climbing twelve houses, the Bronze Saints must descend through seven undersea pillars guarded by Poseidon's Marina Generals. Each pillar must be destroyed to slow the flood, with the Main Breadwinner — defended by Sea Dragon Kanon — as the final goal. Kurumada uses the Marina Generals to introduce a more morally ambiguous antagonist roster than the Gold Saints: many fight not from corruption but from genuine loyalty to a god they consider just. The arc's most consequential revelation is Kanon. The twin brother of Gemini Saga, presumed dead since before the Sanctuary arc, has spent the intervening years manipulating Poseidon's reincarnation as part of his own bid for godlike power. His confrontation with the Bronze Saints folds the previous arc's loose ends into the new one, and his eventual decision to side with Athena marks the series' first redemption arc for a major antagonist. The arc closes with Athena sealing Poseidon's soul in an amphora, but its final pages introduce the next, far darker shadow: the awakening of Hades, ruler of the Underworld, and the return of Gold Saints long believed dead.