Sword Art Online 25 (light novel)

Kirito's chance encounter with Eolyne, a man with the same eyes and voiceas hisdeceased friend, shakes him to the core. But with the possibility ofan interworld warbreaking out in the Underworld growing higher by the day,Kirito has no time to besentimental. Meanwhile, the decisive battle againstMutasina of the Virtual ResearchSociety looms, and she's used her powers toforce a battalion of one hundred magesunder her command. Can Kirito andcompany devise a strategy to defy theiroverwhelming disadvantage in time, orwill it all be for naught?