User blog:T- AvatarFan/Is it OP or is it possible?

I'm mainly creating this blog because of how I feel about 1 of my OC's semblance and wondering what y'all think it. Basically its a copycat semblance. How it works is he has to look at someone use their semblance. When he dose he sees the person's aura, then changes his own aura to match. The change is only temporary, only lasting about 10-60sec and may have a small effect on his mental state.