Y'shtola has a few things going on mechanically, and they all combine to make her a powerful Commander
Absolute Virtue Aettir and Priwen Ancient Adamantoise Buster Sword Clive, Ifrit's Dominant Cloud, Midgar Mercenary Cloud, Planet's Champion Dark Confidant Emet-Selch, Unsundered Esper Terra Gogo, Master of Mimicry Hades, Sorcerer of Eld Ifrit, Warden of Inferno Kefka, Court Mage Kefka, Ruler of Ruin Lightning, Army of One Nibelheim Aflame Sephiroth, Fabled SOLDIER Sephiroth, One-Winged Angel Sephiroth, Planet's Heir Summon: Bahamut Summon: Knights of Round Terra, Magical Adept Traveling Chocobo Vivi Ornitier Y'shtola Rhul Yuna, Hope of Spira
Self-Destruct While I'm not sure how many copies you want of this card, I am pretty scared of it due to its interaction with Heartfire Hero and Screaming Nemesis
Every card here can be played alongside regular, non-Final Fantasy cards
Ursulas Return brought two brand-new Starter Decks to Disney Lorcana
It's not going to break the bank, and it seems unlikely that value will increase