well, bone wall is sure useful against those decks that likes pumping damages unto 1 creature only, but against adrenaline and spamming decks, it's pretty useless.....plus against momentum...damn, sometimes i wish that the charges is .....if enemy's creature is > 3 damages, 7 charges, > 5, 10 charges.....or if the enemy has adrenaline / more than 5 hits per turn , shield charges doubled