Jobs come in the form of special equipment artifacts with the 'Job Selected' mechanic, which will create a 1/1 hero token when the card is played, with the equipment automatically equipping to the token
Aside from the fact that he turns song cards into card draw and cheats out big cards, the artwork is awesome (and hes the only Goofy Movie entrant on this list)
Depending on the card type and its abilities, how that looks will differ: Characters will quest for lore unless they have Reckless
You could, for example, easily go with Ray Easygoing Firefly and have more lore value, and cheaper cost with the same Evasive keyword
This all culminates in an ending where Yuna's whistling to try and desperately reach out to a Tidus who's not there, which in turn results in a post-credits scene where, well, play the game for yourself
But dont worry about it