Board Thread:General Discussion/@comment-4010415-20150211080345/@comment-4010415-20150801110540

A straight highway could give Ruby enough room to build up speed and do that vortex move, but the only problem is, I don't think that's something she can keep up for a long time. Considering that Semblance is basically a more physically manifested form of someone's Aura, it probably uses Aura, so Ruby only has limited energy to use for her speed Semblance.