Board Thread:General Discussion/@comment-128.151.150.18-20161013025548/@comment-4010415-20161013065232

I meant that fire and lava (or level 2 fire aka fira, if you're SYUTK) could behave differently.

Plus, from the existence of steam Dust, I'm kind of assuming that, if you use two different types of Dust to make something, you can't control the thing you make (like using water Dust to make water, then using fire Dust to heat the water; you can't control that steam) but you can control the thing that was directly made by the Dust (use steam Dust, can control the steam that came from the Dust. Is that what Mercury is using? I dunno, maybe).

In volume 1, when Weiss was yelling at Ruby about Dust, she said something along the lines of "Fire, water, lightning, energy!"

And what SYUTK was trying to say is, Dust can come in varieties that are basically the same thing but in different forms (water, ice, and steam are confirmed to exist, despite all three of those being different forms of water), so maybe gravity and barrier are different forms of kinetic energy.