Some might argue the Mindslaver effect on Emrakul, the Promised End is even more miserable, and protection from instants is still a rough hurdle for some decks to overcome.
3 Brutal Cathar While Brutal Cathar is an off-color white werewolf with little synergy with others of its creature type, it is still a strong creature in its own right
If you cast her, you'll probably win the game - she's that strong
Not only does this creature buff all your other dragons with a global +1/+1, but thanks to its storm ability, you can end up with a sudden army of flying beaters if you chain a few spells together
Anytime another creature comes into play, you get to pick between adding three green mana, placing a +1/+1 counter on all creatures you control, or perhaps most importantly, scrying 2 and then drawing a card