Dwynn, the Crimson Apex

+3: Exile the top 4 cards of your library. You may cast two of those cards without paying their mana cost.
-5: Add seven red mana to your mana pool. You may only cast two more spells this turn.
-15: Take an extra turn after this one. During that turn, spells you control can't be countered, you can't lose the game, and all damage is tripled.