The next Magic: The Gathering set—The Lord of the Rings: Tales of Middle-earth—is billed as a crossover, but it’s more like crossing the street than hopping to universes beyond. Magic has been getting pretty weird when choosing dance partners the last few years, with Transformers and Fortnite being some of the oddest choices. But there have also been well received and enjoyable picks, like the Magic The Gathering Warhammer crossover, and a pair of Dungeons & Dragons sets that felt a bit like...