Mox Opal On the surface, Mox Opal seems almost kind of balanced, to the untrained eye at least
Life InsuranceLife Insurance turns creature deaths into Treasure, Rain of RichesRain of Riches makes two Treasures and gives our spells Cascade if we spent Treasures to cast them, and Shiny ImpetusShiny Impetus gives us a Treasure each time the enchanted creatures attacks (which it has to do, thanks to Goad)
Hell, you could literally have every card on this list in a deck with Esika as the commander
This is a great tool to ramp into larger Dragons for constructed and Commander decks alike
The Final Fantasy 16 villain blights any land on the board every time it attacks, removing abilities and making it colorless
Keeping the cards flowing is important for any deck