Although they may exist in real life, they will rarely find play for this very reason
The task itself is actually not that difficult, but it requires you to use much more brainpower than just about any card in the game and would also take quite a long time to activate because it requires you to work with several different numbers at a time and try to put them together in a way you wouldn't be expected to when you play a card game
While one copy did sell for $144,300, current prices have dropped quite a bit
This is a single Yu-Gi-Oh Battles of Legend Monster Mayhem Booster PackThis years Battles of Legend set,Battles of Legend: Monster Mayhem, comes with three new surprises
Unholy Grotto $11.08 Unholy Grotto is a utility land from Onslaught thats never had a substantial reprint in the past (relegated to Secret Lair and The List, which rarely affect prices much)
Just clarity, intention, and a place to come back to when I need a reset