The Amethyst/Steel deck, called Might and Magic, is a showcase for the expansion's new keyword, Resist, as well as the Madam Mim and Merlin package, which is all about bouncing your own characters back to your hand to amplify their effects If you're looking for the starter deck with the more universally useful cards to start building your Rise of the Floodborn collection, you'll probably want to pick up Might and Magic first, as several of its cards will likely see play in the constructed format
Waxen Shapethief Flash alone makes Waxen Shapethief worth a closer look, but copying artifacts as well as creatures pushes it even further
Aristocrats-style Commander decks love everything he offers : sacrifice outlets, card advantage, and inevitability
From doubling ETB's like Kefka, Court Mage's trigger to doubling cast triggers like the Black Wizards from Kuja, Genome Sorcerer, this guy does it all
Thats why I recommend aggressively trading and selling the cards you arent using