Quote Originally Posted by Somensjev View Post
easy, 15 mana, emrakul, roaring primadox

cast emrakul, get an extra turn, end turn, second turn starts, primadox sends emrakul back to your hand. rinse and repeat
That gives you infinite extra turns, but Karakas, and a few other things, actually let you swing with Emrakul during your extra turns, which is actually relevant. Karakas is also significantly harder to remove than Primadox.