Two men who allegedly stole $300,000 worth of Magic: The Gathering cards from a Indiana retailer setting up at tabletop convention Gen Con have been charged with felony theft, according to the Marion County Prosecutor’s Office.

Thomas Dunbar and Andrew Giaume, who created a game called Castle Assault, have been charged with felony theft for their parts in the alleged theft of the Magic: The Gathering Cards from retailer and tournament organizer Pastimes Comics & Games. Should Dunbar and Giaume be found guilty, they face one to six years in prison and up to a $10,000 fine.