A reasonable approximation of the expected power of gold cards is that your 2nd colour of mana adds about a 1/3rd of a mana, the 3rd colour adds 2/3rds of a mana and the fourth is a whole extra mana
You both have five lands on the battlefield
Fire Lord Zuko, for example, is a red-white-black creature with firebending that adds red mana whenever he attacks, and the ability to place +1/+1 counters on each creature you control when you cast a spell from exile, or whenever a permanent you control enters from exile (which is wonderfully thematic)
If you play in two Prerelease events, you'll receive a velvet pouch while supplies last, perfect for holding all those crystal counters
I am swapping out Read the Bones as this has a similar effect
Maybe its Scornful Egotist, the meme-worthy morph creature that always makes you laugh