Shadowwell wrote:?
I think, if allowed, the nullifying part could require more energy of you so it would be far less used. We currently have another character who can temporarily copy powers I believe, but with heavy adverse effects on his mind and psyche already that I was already hesitant to allow. So a character like this could work but could maybe copy powers for a time but not be able to gain anything afterwards as you said with the whole storing section.
The nerfs might make your character seem incredibly limited but if you are okay with that then I am too.
I don't see why S.H.I.E.L.D would have one as a result of Civil War or thereafter, maybe Stark would but that's it. I'll TG you a concept I had since the Avengers all travel together to major missions that I had for some transports.