The nonland side does vary, but, judging by the cards that have already been previewed, are overcosted spells
Similarly, take a card like Granger Guildmage
Observing it purely as a boardwipe leaves it outshone by Day of Judgment and Sunfall, but artifacts are incredibly relevant in Standard at the moment
Rat Colony lets you play any number of them, so when you cast one, you'll likely ripple into another copy and snowball for a ton of Rat Colony copies on the battlefield in one turn
The combination of Amber and Amethyst creates a lot of potential for interesting deck designs, but if you want to prioritize the Madrigal typal, it's best to hone in on the most important, useful Madrigals, and then fill the deck out with stronger strategies.
Includes 1 pack of Japanese booster pack THE FIRST CHAPTER Story Starts All cards encased in the deck are built from the "Beginning of the Japanese Booster Pack THE FIRST CHAPTER Story"