Mark would maybe be okay, but there would need to be a way for people to get it upgraded to be with that effect without either A:giving EVERYONE the ability, making the card in question useless, or B:Forcing yourself (Zan) to make similar effects for all of the other marks. Or both of them put together, but both of them together is not a bad idea though...I mean, marks are already clickable, why not give them a non-passive ability?