Evasive Maneuvers from the Commander Anthology Box.
With Derevi's ability, a little evasion can go a long way, but Derevi packs a lot more than a little. With an army of fliers, a couple of trampler, and even one creature with horsemanship, there will be no shortage of creatures gliding through enemy defenses to untap your creatures (and tap down your opponents' resources as necessary). And backed by an army of creatures with tap abilities, you'll never find yourself with a shortage of diverse strategic choices to act upon. Whether you are seeking card advantage, creature advantage, or control advantage, Derevi's constituents have the abilities you need.