This staggering price is in large part thanks to powerful lands, which almost every deck wants access to
You also need to have the cards to discard up front so you cannot play these on an empty hand making them frequently awful top decks
Teferi, Time Raveler, proved long ago how strong an effect like this can be
Some things Duskmourn: House of Horror did for the first time bothered players, like having characters wearing and using things that we actually use: things like sneakers, or jeans, or a baseball bat
4 Magneton: Aquapolis (Holo Rare) $54.19 Aquapolis can sometimes fly under the radar when it comes to the earliest vintage offerings, with cards like this Magneton exemplifying how this incredibly rare set's cards swerve the spotlight
As for the shadowless base set machamp it can be found in both formats and I believe the shadowed version has both too