Doctor Strange

+1: You may reveal the top card of your library. If it is an instant, sorcery, or enchantment, draw a card
+4: The next time you would cast an instant or sorcery with converted mana cost 4 or less, copy it twice
-7: You may take an extra turn after this one, deal 3 damage to any target, and gain 5 life for each turn that happened before your last.