They all have a casting cost of 2CC and a tap ability that costs 4CC
Digital Art Debuts There's been a pretty obvious push to reprint a lot of classics with their digitally exclusive arts
Legendary Enchantment Enchantment (CTRL to add secondary) Instant Berserker's Frenzy Cast this spell only before combat or during combat before blockers are declared
Both of them do a good job of showing up the expansions new mechanics and key features, and after playing them I dont think a third one would have been necessary, especially because it would have just been another Ruby/Emerald like last time
Something along the line of a scannable code on cards to verify authenticity would get the job done, but implementing the program would be costly, and it wouldn't help with all the cards that are currently in print (barring some sort of mass-exchange program, which would be even more prohibitively expensive)
At this point, its safe to say that Magic: The Gatherings Final Fantasy set was an overwhelming success