Merry-Go-Round is a rare Artifact — Attraction card from Unfinity (UNF), collector number 222a. Current market price: $0.43 (foil $3.35), TCGplayer market prices via Scryfall.
Visit — Creatures you control with power 2 or less gain horsemanship until end of turn. (They can't be blocked except by creatures with horsemanship.)