They're not for sale and are meant to be free samples to welcome and entice players to the game
In their article describing the creative craft of Final Fantasy x MTG, WotC's Dillon Deveney principal narrative game designer for the Universes Beyond team says that Optimistic and Hopeful was one of the design pillars when setting Final Fantasy s tone
Avatar: The Last Airbender play boosters have a good number cards that work beautifully with food, clues, lands, instants, and play-from-exile cards, each are popular themes with EDH players
The trove also includes a booklet showing off all the cards in the set, great to see what you have and what you're missing
Amber/Amethyst Starter Deck List Improvements + Cards To Drop Have a look around the card database for songs, and figure out which works best for your aims
For the most part, this is just an overpriced board wipe, with some artifact hate built in if youre willing to pay even more for it