# Siege Elemental Siege Elemental represents an interesting footnote in Magic's design history as part of the Mystery Booster Playtest Cards 2021 set. Collectors view these cards as experimental designs that never made it to standard releases, giving them curiosity value beyond typical tournament play. The playtest nature means the card exists in a liminal space—not quite official, yet officially printed by Wizards of the Coast. For collectors, Mystery Booster playtest cards appeal to those interested in game design process and alternative Magic history. The nonfoil-only printing keeps these cards relatively accessible compared to premium versions of standard releases. These cards attract players who appreciate the "what if" aspect of Magic's development.