The product is a Mythic rare Lightning Greaves card from the Magic: The Gathering (MTG) game. It is part of the Masterpiece Series: Kaladesh Inventions set by Wizards of the Coast. This foil card, with card number 14, belongs to the Artifact card type and is indeed unique in its colorless attribute, making it a valuable addition to any collector's deck. Please look at the photos they are part of the description.