Overdrive Darkness x 1 Nature x 1 (When this creature is summoned, you may tap an additional 1 Darkness, 1 Nature, or any combination of these cards in your mana zone. If you do, this creature gains the following [OD] abilities).
[OD] Darkness: When you put this creature into the battle zone choose one of your opponent's creatures. During this turn, it gets -2000 power.
[OD] Nature: When you put this creature into the battle zone, during this turn one of your creatures gets +2000 power.