Since it was so iconic during MTG's early days, it's easy to see why it's been able to maintain a lot of its value
Unlike The Lord of the Rings: Tales of Middle-earth which included Modern powerhouses like The One Ring, Orcish Bowmasters, and Delighted Halfling, FINAL FANTASY doesn't seem to have as many format-warping cards (at least right now)
Fabricate is the workhorse of the set, providing an easy-to-understand mechanic on many common cards, enabling artifact synergies, but not increasing on-board complexity
An ability that triggers when a creature becomes the target of a spell resolves before the spell that caused it to trigger
You can even get sneaky with Brainstorm and hide cards from hand disruption and forced discard effects like Thoughtseize on top of your library, or when youre anticipating a mill effect and need to ditch some unplayable cards
And, of course, the game's popularity can affect the value of cards