Secret Summoning is a uncommon Conspiracy card from Conspiracy (CNS), collector number 9. Current market price: $0.16 (foil $0.53), TCGplayer market prices via Scryfall.
Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face up any time and reveal that name.) Whenever a creature you control with the chosen name enters, you may search your library for any number of cards with that name, reveal them, put them into your hand, then shuffle.