Quote Originally Posted by CovenantElite30 View Post
Another question why Putrid Imp over Hapless Researcher? Isn't having more blue cards to pitch to Force of Will better?
There is a minimum density you need to run Force, and beyond that density it's my opinion the argument "it pitches to Force" loses relevance. I've seen many competitive Vintage and some Legacy decks run as low as 15 blue cards main total (including Force itself), and 1/4 gives you good odds of having the pitch card in an opener (almost 82%).

There are other tradeoffs for the card choice obviously, but I'll let Cpt-Qc speak to that.