Merchant Scroll (FoW)

After seeing Sandreline's awesome Mental Misstep with Sensei's Diving Top I was wondering what else could be done. If you never heard of her you better check her work out (hint). Well, couldn't really come up with something but I bought some Merchant Scrolls from some player who came to participate in Extended tournament.

After few games of playing against a blue highlander decks and being really annoyed by Force of Will I had my idea. So what would you say about this?

I have another Merchant Scroll to spoil, so I might actually experiment with it in the near future. But for that I should do a little research...so tell me, what is the mostly searched spell by merchant scroll in your case?