Card Kingdom, 3737 Arlington Ave, Riverside. June 19th. The Magic: The Gathering Marvel Super Heroes Prerelease at Card Kingdom — the first day the set is legal, the format is open, and every player in the pod is figuring out the same things at the same time. Card Kingdom in Riverside is a serious game store that runs events the right way: organized pods, experienced judges, a space that was built for this kind of event. The Marvel set lands with card design built around characters that Magic players already know, which creates an entry point for players who follow the IP and a fresh puzzle for players who follow …