The trio unveiled a handful of promo cards associated with the set, ranging from Commander Party promos, PTQ promos, the Buy-A-Box promo, and more
Avatar's ATK is one point higher than the strongest monster on the field, and Ra used all but one of your Life Points for its effect, as well as gaining ATK by sacrificing monsters (including its Tributes) in the anime and manga (both were changed to 100 for the TCG/OCG)
Furthermore, it plays far more powerful threats than any other deck
Decide the first player at random
Again, Doubling Seasons effect will create twice that many tokens, so you will be getting 4 Jace, Cunning Castaway tokens, each entering the battlefield with 6 starting loyalty, same as the original
Gold is Arena's free currency, which is earned by completing quests, winning games, and reaching certain mastery levels