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It would make no sense to have those along with Historic if Historic is going to have these digital-only cards

R Rare Performapal Sword Fish X WATER Level 2 [ FishEffect ] ATK 600 DEF 600 If this card is Normal or Special Summoned: All monsters your opponent currently controls lose 600 ATK and DEF

This card adds more chaos to the game, and, of course, it's a big bet

Cub cant quite replicate that, unfortunately

If WotC were willing to risk permanently and dramatically changing all future games of Magic by introducing Companions, then there shouldnt be much of an argument about making single-use, bankable mana tokens a part of most every game going forward