Talk:Semblance/@comment-26160399-20170909191742/@comment-28288412-20170909193440

Semblances do have an aura drain mechanic. That's why Sun couldn't keep his clones on Ilia indefinitely and Ilia was able to break his aura afterwards as one example.

Pyrrha probably was subject to this as well which is probably one reason for her not using her semblance to its full destructive potential all the time and instead opting for secrecy.

Emerald's semblance has the limit of requiring active concentration, meaning its difficult if not near impossible for her to use it and attack the opponent at the same time. That combined with her maximum number of targets she can affect being two which is even more straining and while she her semblance is useful as support or outside of combat, her alone it isn't very practical.

P.S: Glynda's semblance is basically Pyrrha's without the limitation of only affecting metal, making it inherently better than Pyrrha's.