Sheldon was a trailblazer in the Magic community, helping to shape the judge program from its earliest days and serving as a level 5 competitive Magic judge until retiring from the program in 2011. A prolific writer and content creator, he shared his insights and expertise through articles, videos, and podcasts.

Perhaps one of his greatest contributions to the Magic community is through the Commander format. Known by many as the “Godfather of Commander,” he was instrumental in the format’s creation and development. As a founding member of the Commander Rules Committee, he oversaw the format’s evolution into one of Magic: The Gathering’s most popular formats. Of his work with Commander, Sheldon said, “to see something that you created and shepherded and nurtured become wildly popular and beloved by so many people, it’s a pretty humbling moment.”