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)
Of course, reading the above list should make it clear that fixing LED wasnt going to be enough
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
Activate only during your turn and only once each turn
Even within Universes Beyond, the product isnt guaranteed, and there's no reason they can't be used for future in-universes sets, either
No worries, this is just a security precaution