I think I've said it before but I'm bloody positive Blizzard enforce some sort of win loss ratio, Few games tonight against zoo while I have the play warrior quest.. I run double ww double revenge and double brawl as I also have 40 spells quest and I just don't draw them when the board is full of 1/1s it just cant be random the last 10 cards to draw contain all my aoe in at least 2 games tonight..