# Form of the Mulldrifter This playtest card from Mystery Booster represents an experimental design that never made it to a standard set. Collectors value it primarily as a curiosity—a window into Wizards' design process during development. The card reimagines Mulldrifter as an Aura rather than a creature, offering insight into how designers explored different mechanical approaches to familiar effects. Mystery Booster playtest cards hold niche appeal. They're not tournament-legal and lack the prestige of official releases, but they attract players interested in Magic's design history. The nonfoil-only printing keeps supply limited. Collectors typically seek these cards for their educational value and uniqueness rather than competitive utility, making them modest but steady additions to specialized collections.