Nicol Bolas, Dragon Lord

+2: Add one blue, red, or black mana to your mana pool. If this mana was used to cast an instant or sorcery, gain 2 health.
-4: Destroy target nonland permanent. If destroyed permanent was a legendary, draw a card
-12: Destroy any number of lands. Draw X cards, where X is the number of lands destroyed this way and add X mana of any color to your mana pool