User blog comment:VedranTheII/Pretentious Diaries 2: What tricks would you teach your Aura?/@comment-5217560-20150719083609/@comment-4010415-20150719192236

My impression was that the Dust crystal the silhouette used to summon lightning burst and disintigrated upon use, which would actually support the idea that Dust is gone once all of its energy is used up.

I mean, between picking it up and summoning lightning, it shows the silhouette with their fist clenched and yellow/gold powder/energy seeping out from their fist.

I just watched that part at 0.25 speed, and when the silhouette puts their hand in the air to summon lightning, a whole bunch of yellow powder flies out of their hand.