Board Thread:Speculation House/@comment-27404492-20170511131216/@comment-26397825-20170516031114

I think Semblance usage and Aura skill should be separated for that list, Piscean. Semblances can be judges based on their usefulness in combat and how much the user actually does use it in combat vs how easy it is to overcome - Emerald's semblance is fairly useful, and she makes good work of it. However, it was easily disrupted by Amber destroying the other Emerald she was seeing, which implies that if you destroy the illusion, you break the hold Emerald has over your mind.

So someone like Yang and Nora would easily destroy the illusion Emerald, revealing the real Emerald to them fairly quickly. Sure, Emerald could probably recatch them in her semblance, but it could take a bit to do so and in that time Yang and Nora would be attacking her with high-impact attacks that have spread damage.