Step right up: Attractions are Unfinity's carnival rides, games, and shops, and they don't work like any other card. They sit in their own separate Attraction deck, never go to your hand, and have no mana cost. When a card tells you to "open" an Attraction, the top card of that deck goes straight onto the battlefield.
In Constructed, an Attraction deck needs at least ten cards with no duplicate names, and acorn-stamped Attractions are only allowed in casual Un- games. Picking Attractions with overlapping lit numbers raises the chance of several visits triggering off a single roll.