Pact of the Harvest

When Pact of the Harvest enters the battlefield, search your library for up to two Forests, put them onto the battlefield tapped, then shuffle your library.
Creatures your opponents control get +1/+1.
"Advachiel's blessing nourishes the land, bringing growth and prosperity. Use it unwisely, and those without such a bounty will begin to lust after it."
-Lelos, Prophet of Growth.