Trivia Contest (3-4-6) (UNF-233) - Unfinity

Visit — An opponent chooses red card, sorcery card, or legendary card, then mills a card. You have ten seconds to name something from the chosen category that starts with the same letter as the milled card. If you do, claim the prize!
Prize — You get {TK}{TK}{TK}, then you may put a sticker on a nonland permanent you own. Sacrifice this Attraction and open an Attraction.