Heroes, villains, Chocobos, Moogles, and whatever the heck Quina is are all up for grabs, and some could well become top-of-the-format decks
You could just as easily run a normal extra turn spell, but that's not nearly as fun
The treasure generation should help somewhat, but when your other options can cheat multiple equip costs, it's hard not to go with those options instead. Tidus, Yuna's Guardian Counter Blitz (Final Fantasy X) Source: IGN Counter Blitz focuses on counters, and you may think it was inspired by Blitzball given the name but according to Holt, the deck is more of a reference to FFX's Sphere Grid experience system
Cloud, Midgar Mercenary This is a card that gets its value through fashion and function
There is a plethora of these Saga creatures throughout the set, and some of them have abilities that can singlehandedly take over games
Cards from the bonus sheet aren't found in the wildcard or traditional foil slot in Play Boosters