I'll admit, I misread this at first, thinking you can only copy something with mana value equal to X, but it is worded in a manner that you count the blue mana in it's cost as well
Goad Now, lets dive into the core of the deck and explore the goad cards
I'm skeptical that it can maintain such a high demand going forward, but since Fabled introduced Iconic rarity, it has certainly introduced the perfect height of card chasing for what is a TCG somewhat still in its infancy
Pair all this sacking with damage dealing or life loss inducing cards like Blood Artist, Zulaport Cutthroat, and Mayhem Devil and you'll soon get the table under your heel
I pulled basic lands for Urborg, Tomb of Yawgmoth and Yavimaya, Cradle of Growth to make these more likely
If you can continue to quest with your Evasives and control the board with Dragon Fire, Mother Knows Best, and Kuzco, you should have an easy time staying ahead on lore