MTG Marvel crossover leak reveals Teamwork mechanic and Avengers card pattern

After Teenage Mutant Ninja Turtles cards accidentally showed up in Lorwyn Eclipsed packs earlier this year, Magic: The Gathering leaks have become increasingly common. The release of each new set seems to lead to leaks for the next one — maybe that’s inevitable when these sets are less than two months apart. Now, an image of four uncommon cards from the upcoming Marvel Super Heroes set, due to arrive in June, hit Reddit over the weekend, with the poster alleging that the cards were accidentally included in packs from a Secrets of Strixhaven draft.