Cover the Spot (V.3)

Visit — Drop three cards you own from outside the game one at a time onto the playing area from a height of at least one foot (about 0.3 meters). If those cards completely cover this Attraction, claim the prize!
Prize — You get {TK}{TK}{TK}{TK}, then you may put a sticker on a nonland permanent you own. Sacrifice this Attraction, then open an Attraction.