Nature's Revolt

combine with shock and reclaim for cheap land destruction. or pyroclasm if you don't mind eliminating yours as well. that works if you already have a big creature out anyway.
eradicate can eliminate all their lands from their hand, library, and graveyard with this too.
also allows you to use black spells like terror on their lands.

This card is great if u have alot of lands, also if u have a card that's +?/+? to all of ur creatures, and or a levitation card, or a graveyard wonder, and no one be able to defeat u

Sure the use of what the one before me said is good if your running it like that but it is even better if you run this with with Plague Wind, sure it may cost a bit but well worth it to make a wide out spot to hit them hard!!