This deck is just insane, it beats everything except for possibly mill rogue. Ironbeak Owl is extremely useful for silencing your own minions and getting it out 1 turn earlier then Spellbreaker is more important then +2/+2 because your minions will either be frozen or extremely large anyway. Try not to make your minions to big so you spread out your opponents removal. Use Mistress when you need life gain not as a turn 1 play.
I've gone 14-1 with this deck (1 loss to mill rogue where he milled N'Zoth and Guldan).