As an additional cost to play Banned Eldraine Card, pay {B}, {3}{R}{G}, {3}{R}, {2}, {0}, or {1}{G}. It becomes a copy respectively of Cauldron Familiar, Escape to the Wilds, Fires of Invention, Lucky Clover, Mystic Sanctuary, Once Upon A Time for the rest of the game in all zones. (You can't choose Oko. Because let's be real, nobody wants to play against Oko again.)