Ragna Crimson manga volume 14 features story and art by Daiki Kobayashi.

Dragon Scourges Ragna, Nim Hamunim, and Li Ruoxi are dispatched to Lugia Mine, where a fragment of the legendary Silver Comet has been found. Despite staying on high alert, they're ambushed by a coalition of superior dragons from the Boned and Roaring Bloodlines! Ragna may have humiliated some of these foes before, but can he handle Glestnowak, the Machine Dragon, who's armed to the teeth with advanced weaponry?!