Keep the serialized cards all good and release a version, maybe where just the Chocobos feathers are gold foil, and have it be unserialized
For example, if you want to make Tidus your white mage and turn Lulu into a fighter who inflicts lots of status ailments, it's well within your power to do so
To triple a creature's power, that creature gets +X/+Y, where X is twice that creature's power and Y is twice that creature's toughness when Tifa's Limit Break resolves
Its been a busy year for Wizards of the Coasts limited-time mini-sets, and while the company sold out of all three Final Fantasy drops in record time (leaving many disappointed), you can still get them via third-party sellers
When building a deck, players can not have more than four copies of any single card
This is perfect if a strong character is heavily damaged, has a benefit to being banished, or you are simply low on cards