Keron, the Demon's Child

+2: Destroy target creature that is black, white, or green, or a permanent that has a casting cost of 4 or up.
-3: Untap three lands. Go through your library and find an instant, sorcery or permanent card and use those three lands to cast it
-12: All creatures gain fear, double strike and indestructible until end of turn. You gain 8 life.