That ' s assuming rares are better in terms of power than commons , but that doesn ' t seem to be true Going by this tierlist , commons average a score of 52 . 39 while rares average 48 . 56 . It ' s actually better that it ' s a rare than a common , since that means its taking the place of a worse card on average . And frankly , I think this might actually raise that average by being above that mark . Brewmaster scores pretty badly 45 , but that ' s mostly because it ' s effect is usually a downside . This lacks that , so I think it ' s going to be more like a vanilla river crocolisk score 56 which is above average , or maybe even a little higher , since it allows you to selectively sometimes get the brewmaster effect when it ' s positive without requiring it when it ' s negative . Though all that said , that might actually be a bad thing rogue is doing fine in arena . A card that ' s decent in arena and bad in constructed is really the opposite of what we need .