Board Thread:Questions and Answers/@comment-88.171.110.213-20150322210405/@comment-25550409-20150808084032

98.240.188.154 wrote: Episode 21 of season 2 he blocked bullets using a sword skill, was n't that an OSS? Nah, that was his outside system skill Bullet Deflect. For him deflecting the spells, Spell Blast.

http://swordartonline.wikia.com/wiki/Outside_System_Skill