Board Thread:Speculation House/@comment-4784525-20131010155204/@comment-10380701-20131010160104

I think Aura is one of the ways to use Dust. It's like fire to gunpowder. Rookie Dust Mages like Weiss are most likely not using Aura with their spells... yet.

EX-tier Dust Mages like Glynda and Crimson uses their Aura to an extent. One proof is when Glynda Jedis a few debris towards Crimson.

Crimson is a special case. She's most likely using her aura to cast Dust spells and at the end of the fight, she did sort of use her Aura to deflect some of Ruby's shots.

A way to tell the difference between Aura and Dust is the magic circles.

Dust has complicated magic circles. Aura is only a simple circle.

Just my two cents.