Game Mechanics Aren't Copyright, but They Can Be Patented

Game mechanics aren't copyright or trademark, but they can be patented. The goal of the game is to reduce the life points of other players to a level below one. Cards may be obtained from retail outlets. Playing with other players or collectors and winning cards at games and tournaments. So that game mechanic, congratulations, again, don't take legal advice from podcasts, is now an expired patent. Was the exclusive property of Wizards of the Coast for 20 years is no longer?