Pole Positions effect could go on forever without a single phase within a turn ending and when that happens, infinite loops could be created
We will explain why that matters more than anything else in a moment
C Common King Scarlet X TRAP Continuous If a "Red Dragon Archfiend" monster you control battles, during damage calculation: Make that monster you control unable to be destroyed by that battle, and if you do, Special Summon this card as a Normal Monster (Fiend-Type/Tuner/FIRE/Level 1/ATK 0/DEF 0)
While even utilizing her as a way to bring in a value engine or a silver bullet can be quite potent, there's something particularly elegant about fetching Vivien with Arena Rector and then using her ability to pull a win out of your library
Truth be told, this is probably totally necessary, as using something like a Gravedigger to repeatedly recur a Hero's Downfall and a 2/3 lifelinker might be too good
And it seems theyve realized that if they let you get all the bulk from your code cards, youd get too much Credits