my friend has approached me and asked me a basic question that i'm not sure how to answer. it is about protection with these two cards: Kinsbaile Cavalierand
Black Knight
he was asking since the black knight has protection from white, and kinsbaile cavalier is a white card, if the ability of that card would work on black knight, or is that ability deemed "colorless", or something else, since its an automatic ability and not a payed ability?