I believe this is true regardless of how difficult they are to trigger, but emerging from Mortal Combat victorious seems like a breeze in a format like Commander where you can mill yourself to your heart's content with commanders like Grist, the Hunger Tide, Iname, Death Aspect (the mill comes from dumping your creatures into your 'yard on ETB), and Zask, Skittering Swarmlord
Time travelling is a new mechanic in Universes Beyond: Doctor Who that lets you either add or remove a time counter on your suspended cards, allowing you to cast a whole host of cards at the same time for just seven mana
See things like Ambling StormshellAmbling Stormshell or Pugnacious HammerskullPugnacious Hammerskull low mana value and massive stats, but they stun themselves so theyre likely not swinging in every turn
An ongoing supply of hard to handle threats win games
Of course, I was wrong and with a talented player wielding the scheme deck, they managed to unleash all sorts of horrors
You must pay the costs to cast that Zombie card