Talk:Semblances and your OC - A Guide/@comment-26417997-20150522193820/@comment-8182065-20150523045848

That's really one of those double edged sword ideas that has to be properly balanced, otherwise it's not worth using honestly.

For this case, in battle he only gets 5 seconds of protection, but afterwards he's completely vulnerable to all attacks, and could be dead before those 10 minutes are up. I'd say try to think of a way to give him more time to be invincible, while having a decent drawback that won't keep him too open.