Sword Art Online

Season 2, Episode 21

Episode Title: The Monument of Swordsmen

Air Date: 2014-11-29

Overview:

Asuna and the Sleeping Knights’ attempt to defeat the boss on Floor 27 has been observed by a guild specializing in boss raids. Now 20 of its members block the boss room. With Kirito stalling the rest of the guild, can Asuna and the others break through?