The Superlatorium (230d)

Visit — An opponent chooses "the cleanest," "the hungriest," or "the strangest." You choose a creature, then ask a person outside the game to choose the creature that best fits the chosen criteria. If they chose the same creature you chose, claim the prize!
Prize — Create two 1/1 red Balloon creature tokens with flying, then sacrifice The Superlatorium and open an Attraction.