[1] Marshall's stint at Eternity didn't last long, and by the mid-1990s, he was working as an editor at Billy Tucci's Crusade Comics.
David-Marshall was one of the founders of Gray Matter Conventions, one of the first Magic: The Gathering tournament organizers; and Neutral Ground, formerly the largest gaming location in New York City.
[2] He previously played on the Pro Tour as a member of Team Monkey Dog.
[citation needed] In addition, David-Marshall was a tournament organizer for the Upper Deck Entertainment collectible card games Yu-Gi-Oh!
[citation needed] In 2020,[2] David-Marshall and his partners formed InterPop, launching an NFT line of comics where readers could choose the ultimate direction of the stories.