Windgrace, Lord of Urborg

: Windgrace, Lord of Urborg can be your commander. Whenever you tap a land for mana, add one mana of any type that land produced.
+3: Discard a card, then draw a card. If a land card was discarded this way, destroy target artifact or enchantment.
-14: Destroy all artifacts, creatures and enchantments. You get an emblem with "Your opponents can't search libraries and can't take extra turns."