Burn the Unholy Feilds

Madness {2}{p/r}{p/r} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
At the beginning of each players upkeep that player sacrifices a land, and takes 2 damage.
The madman shrieked"THE FIELDS ARE EVIL! THE GRAIN OF THE MAD ONE ARISES!" as he set fire to all the crops