I'm always looking for clean, simple dominion cards that haven't been done yet. I was really proud that Garrison won one of the original mini-set design contests, for this reason. Anyways, I was half awake this morning and this idea came to me, and I feel like it's simple enough that someone must have done it somewhere already, right?
Jonesy -- $4
Action
Look at the top four cards of your deck. Discard two, and put the rest in your hand.
Closest comparisons are Oracle, Moat, Smithy. There's no reason this can't cost $4, right?