Create your army of Zombies with synergistic Humans, like Ghoulcaller GisaGhoulcaller Gisa and Wilhelt, the RotcleaverWilhelt, the Rotcleaver, and then enjoy all of your exploitative shenanigans
Like most Magic: The Gathering cards, the value of Shroofus Sproutsire depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Foundations Jumpstart)
Im not saying that your premise is crazy by any means, but I believe a PSA 10 1st edition Base Set Charizard (with no issues) could sell for $65k+ in todays market (its already been sold at that valuation)
It has only recently come back in vogue thanks to some new printings that helped fill the holes in the deck, but there's no doubt that Winota, Joiner of Forces has been one of the most powerful cards in Standard since it was printed, even if it can be challenging to use at times
SWSH Celebrations
Jodah, Archmage Eternal Jodah, Archmage Eternal works great as a 5-color commander in decks with an abundance of high mana value cards