Knights buff needs to affect knights only

With the knights buff some champions become nearly immune to damage. This is most noticable with Braum. You don't even have to get him up tiers. When his shield goes up he completely negates damage rather than reduce it. If someone puts items on him to make him use his shield a lot he becomes virtually unkillable and if someone tosses another glacial in there then it becomes so stupid having him freeze you infinitely while you do no damage