The most powerful are usually difficult to pull off without help from Vorinclex, Monstrous Raider or something similar, and its always fun to see a planeswalker with an ability that can create an emblem when it first enters, like Gideon, Ally of Zendikar
Just like how those clamouring for Hogaak, Arisen Necropolis or Faithless Looting to get banned in Modern a couple of months ago should have been registering the deck all along, if you want to win and genuinely believe a card needs banning in Pioneer, then you should be playing it and trying to break it
But when you have to face this Jack The Ripper rip-off on your third turn, the odds are pretty good that theres not going to be much you can do
The French set has six errors and the German set has five
Rebuff the Wicked and Wild Ricochet look awful when you have access to Bolt Bend, Untimely Malfunction, Deflecting Swat and Return the Favor