Magic: The Gathering on Twitter: "Buy a Box + Extra Turns = Winning! Preorder now and get your Core Set 2019 booster box a week early at Prerelease, July 7 & 8. #MTGM19" / Twitter
Is there design space for "take an extra turn [at some later point in the game]" : r/magicTCG
Taking All the Turns – A Modern Extra Turns Primer – brainstormbrewery.com
o:"extra turn" · Scryfall Magic: The Gathering Search