Crack The Whip -> Coordinated Assault
I'm surprised that this hasn't come up to discussion in this lounge yet. Crack The Whip, a black spell that modifies a black hero with "After you play a black card, give this hero and its allied neighbors +2 Attack this round," has been renamed to Coordinated Assault. Apparently, due to it being a 'black' card that has a title and imagery of whipcracking, some of the people were offended, arguing that the card contains racist connotations. There's already an article about it.