I probably don't have all the facts but it's always bugged by that MTG has patented (or some rights) on similar card games and has effectively strong armed any

I probably don't have all the facts but it's always bugged by that MTG has patented (or some rights) on similar card games and has effectively strong armed any similar and popular game into paying them a license. My understanding is that game mechanics can't be copyright protected so I don't get what they are suing over and how they have been so successful in getting fees