Played in in my Pir/Toothy deck and once it hit the table, a few moments later the game was over. Was extremely un-fun for everyone. It's a card that is on the same level as Sorin Markov and Magister Sphinx. They're not banned and shouldn't be, but in the spirit of EDH, you shouldn't play it if you want to keep your friends.
Come on and unban Recurring Nightmare and/or Rofellos, LLanowar Emissary! I held on to my copies for so many years now. It's time!