Mystical Archive means it's time for 1v1 Commander!
With the Mystical Archive cards, we're now going to have cards in Arena that aren't playable in Historic, plus a lot of new, exciting additions to Historic. It's time for a permanent play-mode where we can use all of these new cards. We've been asking for a permanent Historic Brawl play-mode for a LONG time. But what if you gave us something even better? A permanent 100 card Commander play-mode where we can use the new Mystical Archive cards that aren't legal in Historic, so it wouldn't be "Historic Commander." Maybe ... "Arena Commander"? That separates it a lot from normal Brawl. This is a mode for people who have tons of cards and/or are willing to craft them. Please!!! And make it permanent. So, we can **** out our decks (Japanese alt-art!) and not have to wait to use them for the rare times you make the play-mode available.