User blog comment:Varzan Deodinm Beldinm/Most Powerful Semblance?/@comment-3257939-20150109000412/@comment-25555436-20150109002546

It doesn't necesarily have to be like the Imagine Breaker. The user could be unaffected in any way by their Semblance.

And in a place like Remnant, having your Aura locked could be dangerous. Not only because some, like Weiss, rely 100% on Semblance, but also because everyone is so strong (yes, even Jaune and the Beowulves) that if you don't have Aura to block the damage, you can be killed quickly.

Jaune survived the fight against the Ursa thanks to his Aura, and he still had a good bunch of bruises and maybe a small cut, and he has tons of Aura supposedly. Now, imagine if he didn't. Jaune would have ended up like a walking dead at worst, and likely end up with some broken bones from so many punches to the face.

Without Aura, Ruby would have been blasted to pieces by Roman in ep16, and Yang would have been crushed by the Paladin's hits.

In other words, Aura is the reason every Hunter is alive so far. Now, take out the only thing that allows them to survive any encounter with the Grimm (excluding Beowulves and Ursas, and probably Boarbatusks). They become Glass Cannons. Sure, they are powerful and can take down a great number of Grimms. But once they get hit, it will hurt.