Driku, the Raging Earth

+2: Exile a land you control onto Driku: Driku, the Raging Earth deals 1 damage to each creature and to each player.
+4: Exile all lands you control onto Driku: Driku, the Raging Earth deals 5 damage to each creature and to each player.
-15: Driku, the Raging Earth deals damage to each opponent equal to the number of cards exiled on Driku, the Raging Earth.