Here are just some card recommendations for generating bats and vampires: Regal Bloodlord, Lunar Convocation, Call the Bloodline, Bloodline Keeper Flip , Timothar, Baron of Bats, and Aclazotz, Deepest Betrayal Flip
Functionally, Yuna's Whistle is a pseudo-cantrip that always replaces itself with a creature, and finding the creature gives you some +1/+1 counters too, so there's combat trick potential as well
Giving an equipped creature Menace can be decent with Choose a Job, but in the end, the juice really isnt worth the squeeze
To be honest, I still havent played that much Standard and could be wrong, but I doubt it
The differences between the Second Print Run are: No mark for reprint
This set also has plenty of artifacts to fuel Urzas abilities, so I have to imagine itll be pretty broken in Final Fantasy Limited