During the opponent's Turn when a Monster declares an Attack, "The Hidden City" can flip a face-down "Subterror" Monster to not just active their effects, but negate the Attack as well
Technically, without omniscience or a juicy interview, we dont know exactly why Karl Marx wasnt given an MTG card
It's fast, it's consistent, and it's efficient, which is an awesome place to be week one
As a general rule, the cheaper the card, the higher the spread between buylist and retail value
Apparently, theyre going to be expanding a video game section in the summer
There are also top 8 and champion versions of the card which arent readily available except at auction