Thread:Darkcloud1111/@comment-15108745-20130826011959/@comment-3146930-20130826033237

They explain Dust as being Energy (which is a large category), as well as things like fire, ice, and lightning. In Glynda's battle, she uses ice to hit the airjet Roman is using to get away. Then Crymson counters by making explosions. Glynda uses the debris caused by that explosion to attack the ship (before you say debris isn't an element, Glynda used energy to move it, as in kinetic energy). The Crimson turned the debris to ash with a large explosion. Later Weiss is seen using the Dust in her sword to launch a stream of fire...that misses and burns down the forest...ya...

However on the Aura side, Ren uses his Aura to stop the snake and break off his teeth before causing the snake's head to explode with an Aura-fueled punch. Jaune's Aura allowed him to heal from injury and Pyrrha was able to unlock Jaune's Aura with hers. Also, Jaune's and Pyrrha's weapons glow along with them, obviously reacting to their Aura.