User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-16281343-20141224124121/@comment-124.195.119.86-20141231201605

Ah well it could be for the next arc not the current one. Kiba has developed a way to mass produce dragon slayer swords and he also has Gram which is also a Dragon-slayer sword. So why not give him another powerful dragon-slayer in the next arc, that way he will become an ultimate weakness for Issei LOL.