Vol. 9War and the Abyss
Seiya led the defense of Under World against Vector and foreign players, then helped open peaceful relations between Under World and the Real World. He returned to Shangri-La Frontier and joined Sun Yue to defeat Abyssal Kukanid, while Lycaon’s curse remained a threat.
- Seiya rose through the Dark Knight Order and agreed to lead Vector’s invasion force, while Kirito and Eugeo reached Alice, who reacted to Seiya’s name.
- Seiya took command of a million soldiers marching toward the East Gate and accepted Tiael’s offer to bring the Dark Arts Master Guild to his side.
- Seiya killed Vector and fought off the invading foreign players until Asuna, Nao, and Shino arrived to aid the Human Realm’s defenders.
- Seiya changed Under World’s systems to require authorized visitor accounts and allow its residents to enter the Real World.
- Administrator and Tiael came to the Real World and began cooperating with its authorities after Seiya supported peaceful exchange.
- Seiya joined Sun Yue on a journey to face Abyssal Kukanid, but Night Raid Lycaon and its Doppelganger attacked their group along the way.
- Seiya and Sun Yue defeated Night Raid Lycaon, which left Sun Yue’s curse deepened before vanishing.
- Seiya and his group endured Kukanid’s shifting Holy Grail powers through a three-hour battle and defeated its Imaginary State.