I think Zilliax is proof that you can have a strong card that's also fair, fun and requires some skill. Some strong cards deserve to get nerfed, but I say we need
Hearthside Chat: Magnetic - The Boomsday Project - YouTube
Magnetic - Hearthstone Keywords & Mechanics - Out of Cards
Magnetic doesn't work on a full board - WAD or an Oversight? - General Discussion - Hearthstone General - HearthPwn Forums - HearthPwn