Neat card.
I think, though, that the most important thing to worry about here is the reveal and rearrange portion. I might be wrong, but I think it could be pretty powerful, maybe too powerful. I think it's reasonable to say that I could buy ~4-5 of these pretty quickly, like around turn 7-8. At this point, about 1/4 of your deck is Exhibition, so most turns, you can do the following: Play exhibition, reveal four cards, reveal exhibition, gain silver, play another cantrip, play exhibition, buy gold.
This could be a really powerful strategy. Of course, eventually those silvers will water down your decks power, but at that point, hey, you're buying provinces anyway. So I think it needs a slight nerf, maybe it should only reveal three cards.
However, what do I know? Playtest an Exhibition-only strategy, see how it does.
Also, change the type to Action-Reaction.