Secluded Courtyard is a uncommon Land card from Commander Masters (CMM), collector number 1030. Current market price: $0.36, TCGplayer market prices via Scryfall.
As this land enters, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type or activate an ability of a creature source of the chosen type.