Each of the small cells will hold about 50 double sleeved cards, more if single or unsleeved
In addition to the obvious things like Syphon cards (do some effect to each other player, gain benefits depending on how many other players this hit), there are cards that affect a random opponent, cards that give everyone the game the ability to join forces to create a big effect (for example, a sorcery that lets everyone pitch in mana and then lets everyone put lands into play from their decks), and Enchant Creature cards sorry Auras that boost the creature while preventing it from attacking to
They can be played alongside high-cost cards in order to spend your extra ink and develop your board, they can get buffed by a Support character like Rolly and become a cheap way to trade up into bigger threats, and Lucky can discover them when you use his ability Good as New, making them more valuable in your deck than in your hand
While it is not the strongest card in the set and its high cost doesn't help either, this could be good in limited play." Magic: The Gathering fans got to take a peek at the Final Fantasy crossover earlier this year at MagicCon 2024