Reducing Auron's power below the exiled creature's power won't cause the exiled creature to return to the battlefield
In older formats, you can take advantage of the Tron lands, or just colorless ramp in general
In 1v1 formats, its essentially a waste of your mana and your time, but when you have three opponents actively casting spells each turn, Rhystic Study transforms into a powerful draw engine
Additionally, Infinity Weekend, December 12-14, 2025, is your chance to obtain the alt-art non-foil promo A Whole New World card
However, perhaps because FF7 is so popular, I get the impression that many of the popular characters are intentionally designed as cards expected to see a certain amount of play
I think mostly that is me being on the wrong side of it far more often than the right side