User blog comment:Waters Knight/Monty Tweets About 'Dust Levels'?/@comment-10380701-20140514051036/@comment-4010415-20140514075928

I'm not sure Weiss controls dust via glyphs. I think she just opens the dust exhaust port on Myrtenaster, and whichever dust vial is in the slot that flows into the exhaust port is the dust she's going to use. It flows out of the port and covers the blade. Once she disturbs the dust, it results in the elemental effect that we've seen her use. I'm not entirely sure how exactly she disturbs the dust. It may be possible that she pulls the hammer to release the dust and then pulls the trigger to disturb the dust in some way.