Also note that's "cast" not "play" so if you exile an artifact land, you cannot drop it as your free thing this turn
Minnie Mouse is less popular than Mickey, but she's definitely worth quite a pretty penny as one of the first iconic cards in the entire game
Ignoring the silver-borderedness of it all for a moment, Applejack's also just a fine Magic card, creating a 2/2 with upside every turn for free
Loxi: Might require a bit of finesse to make this work, and 5 mana isn't super cheap either, but copying some abilities can be really strong
Yurlok of Scorch Thrash gives everyone mana, then burns them if they cant sink it somewhere
You may have tried a precon, and found them pretty awesome, but youre ready for more