Board Thread:Off Topic/@comment-25343309-20150328012833/@comment-25857155-20150424215308

Like... when attempting to channel Dust through the blade, it is easy to accidentally try to tap into the Dust used in the weapon's forging process as well, which sometimes results in an explosion as the Dust being channeled attempts to fuse itself to Dust within the blade (and inevitably fails). Or something like that. Alternatively, the Dust "spell" might just fizzle.

Of course, there is no telling how accurate that might actually be, since we have no canon verification of any Dust-based forging process nor details on how Dust "spells" work beyond activating the stuff with Aura.