Kess, Dissident Mage
Legendary Creature - Human Wizard
During each of your turns, you may cast an instant or sorcery card from your graveyard. If a card cast this way would be put into your graveyard this turn, exile it instead.
I know we've had a bunch of 4cmc great creatures that didn't make the cut, but this is probably one of the most powerful I've ever seen. It's probably even a passable Oath target.