Nicol Bolas, the Escaped

+3: You gain 2 life and target opponent loses 2 life. Draw a card.
-4: Repeat this process X times where X is the number of cards in your hand. Each opponent loses 3 and sacrifices a nonland permanent.
-12: Each opponent gains an emblem with "at the beginning of your upkeep, you lose 3 life unless you exile two nonland permanents."