Searing Ghoul

Who has played World of Warcraft, might know the Searing Ghoul. It's a Ghoul that set anything near it ablaze. Thus, it can't be frozen, because if just unfreezes itself. 

I really like the Freeze ability in Hearthstone (because I play Mage alot), but I understand it might be very annoying. That's way a minion that can unfreeze itself might prove useful. 

Searing Ghoul allows you to destroy one of your opponent's minions and then attack with the unfrozen Searing Ghoul, or if your opponent attacks one of your minions, the Searing Ghoul will be unfrozen next turn.