User blog comment:B214/Volume 17 spoilers./@comment-1359322-20140311050948/@comment-23853100-20140312015153

Maybe a volume on the origin of the Demon Swords. We know about the origin of the Holy Swords, but we know nothing about the Demon Swords. Maybe upon learning about the Origin of the Demon Swords. Yuuto might be able to master Gram and the remaining 4. Still i wonder if there's still the possibility of Sword Birth and Blade Blacksmith combining.