Each token represents a real physical card stored in a vault
Before the various Portal and Starter sets became legal, the biggest pushback against their inclusion in various formats was that two amazing cards would get added to games and warp metagames and such -the horsemanship ability, which was essentially unblockable, and Jungle Lion
Sets like Bloomburrow and Wilds of Eldraine also used it widely on their card lists, creating worlds and gimmicks where food is just as important as it can be in the daily life of human beings
Theft cards are already extremely powerful in Commander, so stapling you become the monarch to a theft card makes it even more insane
Against decks like this, it's often better to try and take Prizes as quickly as possible rather than try to neutralize all of their threats by knocking them out
Play Teferi, Temporal Pilgrim into The Temporal Anchor, and you'll have a steady means of drawing answers