It cares about artifacts and Phyrexiansbut mainly artifacts
Each deck offers a few different commanders to put at its helm
Its tough to gauge this one, but its probably better than it looks Evasion is always going to be useful when cipher is a possibility, and this can dull the incoming blows and deliver some damage in the Orzhov deck
The chapter ability matching the new number will trigger
However, following Wizards' own statement, we can expect the Stranger Things cards to make a reappearance sometime around the release of Streets of New Capenna in Q2, 2022.
But if its Final Fantasy flavor theyre going for, theres plenty to consider from other Final Fantasy cards, whether were talking about the core set, Through the Ages, or some of the Commander decks