Korvold, Gleeful Glutton initial casting cost of Korvold and his Commander Tax can be shaved down by sacrificing your permanents
The card shop originally listed the card for $200,000 before settling for a cool $50,000 "or best offer," and in this case, the best offer ended up being $40,000
You might be able to do something using plot to set up spells, then sacrificing this card to unload, but the more likely use case is slotting it into the sideboard for times when it'll be really impactful
It has items, locations, Reckless challengers, Huey-Dewey-Lewey combos, and a couple of Rise of the Floodborn cards that weren't playable back then and still aren't playable now
Notably, Ravensburger has produced numerous Disney-themed puzzles
#1 Cavern of Souls Cavern of Souls is not a new card to MTG