Rock Star is a common Creature — Elemental Performer card from Unfinity (UNF), collector number 122. Current market price: $0.04 (foil $0.23), TCGplayer market prices via Scryfall.
Reach When this creature enters, you may discard a card. If you do, reveal the top five cards of your library. Ask a person outside the game to choose which of them is most like a rock band. Put that card into your hand and the rest on the bottom of your library in a random order.