This is a card designed with Aggro decks in mind and is very bad for that playstyle. Is very bad in the Hunter Quest deck also as you want to get the quest completed asap, not slowly. Not to mention this is an Epic. May prove to be pretty good in Arena though.
Interesting. I think people cleverer than myself will find some pretty decent ways to use this. It's a decent turn 1 play for any spell heavy class looking to stall aggro (though freeze mage is going away, so maybe not so much any more). Throw it in a Hunter deck and you can still get board presence with Animal Companion and Cat Trick. You need to trade it in pretty shortly, of course, but it could work.
Actually this minion would be insanely good if quest mechanics didnt exist... for instance if you play mage or druid, you don't want to play minion on turn 2, you can play a spell. But the quests make 1-drops useless.