Master Duel [Master Duel] Synchro x Xyz Festival: Extra Missions September 23, 2022 Ness Master Duel, Synchro x Xyz Festival No Synchro or Xyz Summoning. Additional missions have been added for the Synchro x Xyz Festival: The missions require you to activate 30 spell cards and win 10 Duels, with each mission awarding in total 200 and 250 gems respectively.