User blog comment:B214/Volume 17 spoilers./@comment-16281343-20140222135310/@comment-24501441-20140222163534

I'm curious what that translation is referring to? Maybe that Longinus Smasher was unlocked to Issei because he learned how to use his Wyvern's more, therefore allowing him more control of his sacred gear, or that he can reflect and boost his Longinus Smasher with the Wyverns.

Although, it would be awesome if all of his little dragons could have mini Longinus-Smashers coming out of their chest and just reeking havoc with them.