Although the main content of these booster releases will be legal in all formats, they will contain products (like Commander decks) and cards (like Special Guests ) that are not part of the main sets and will be Eternal legal (i.e., legal only in Commander, Legacy, and Vintage for new Commander and/or Jumpstart content) or wherever the cards are otherwise legal (for reprint content)
Play Commander at the highest level with a special Magic: The Gathering - FINAL FANTASY Deck of the Collector's Edition, which consists exclusively of surge foil cards
First Day of Class First Day of Class has to be the best learn card available for its ability to enable some combos along with other cards
Even within Universes Beyond, the product isnt guaranteed, and there's no reason they can't be used for future in-universes sets, either
When Sovereign Okinec Ahau attacks, you can place another +1/+1 counter on Avacyn's Pilgrim because thats the difference between its base power and current power