Ban'yu Jo

+2: Sacrifice a permanent, exile target permanent. Deal 2 damage to each valid target you don't control.
-4: Exile target permanent you don't control, deal 4 damage to it's controller and 2 damage to each other opponent.
-14: Exile any number of target permanents. Then, deal X damage to any number of targets equal to 20 minus the number of permanents you exiled.