Treason of Isengard

Put up to one target instant or sorcery card from your graveyard on top of your library.

Amass Orcs 2. (To amass Orcs 2, put two +1/+1 counters on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)