Board Thread:Speculation House/@comment-4784525-20131010155204/@comment-16502426-20131013062233

Very true. What appears to be the same color dust has been shown by Weiss to be some sort of energy wall,  as well as an explosive source. My thinking is that her 'glyphs', are created by channeling aura through Myrtenaster. All the times she's in control of the dust, it takes a clean, controlled form. The two times she wasn't in control of it (Ruby's sneeze, and when she had to avoid hitting Ruby), the dust reacted very explosively.