You could even add Loot, Exuberant Explorer or Hugs, Grisly Guardian for extra land drops and card advantage
This five-mana red and white planeswalker comes in with four loyalty, can create 3/2 spirit tokens, allows you to Discover with a value of four - which means you can cast the next nonland card in your library with a mana value of four or less for free - and lets you exile cards from your graveyard to gain mana, then cast those cards if you want to
Gold is just slang that comes from the old gold card frame used to show multicolor spells
Practice your addition and multiplication tables, because you want to build in a bunch of extra land drops
Even so, we can count on different methods of placing creatures at the bottom of the deck, most notably The Cauldron of Eternity, a powerful artifact that deals with exactly this mechanic
The rules and restrictions are object of common agreement, or a given policy, and may differ from the above-mentioned "fair play requirements"