Not only could it be a three-mana instant-speed token, copying a Voice of Resurgence token or a 5/5 wurm, but it also countered the premier "wrath" card in the format, Supreme Verdict
These appear more often than other cards for a time and serve as functional equivalents of the original Universes Beyond cards, much like the Kaiju themed cards in Ikoria: Lair of Behemoths
Isshin decks typically combine token generators like Adeline, Resplendent Cathar with burn effects like Hellrider and Purphoros, God of the Forge to blitz the table to 0 before they can react
Its main purpose is to fetch an Expedition Map most of the time, but if you decide to run Chalice of the Void in the main deck, you can also grab it for a later turn
Mind Control Effects Another sneaky way to deal with indestructible creatures is just to take them for yourself