when was yugioh card game made The Rarest Yu-Gi-Oh Cards And What They're Worth Today I learned that Yugioh

Mana Crypt (Kaladesh Inventions Series) The most valuable Magic card not on the Reserved List, Mana Crypt is valuable for similar reasons as Mana Vault and Sol Ring: it can easily add a lot of extra mana to the mana pool and enable some explosive early plays in a game

As the Citadel player, you can rattle off spells until you hit a land pocket, and as the non-Citadel players, you should try to kill the whoever plays this superb black artifact

Exile all opponents' graveyards, then create X 0/1 black Thrull creature tokens, where X is the greatest power among creature cards exiled this way

Honorable mentions As usual I have a few more options that didnt make the cut that obviously you can ask me about either here or on my personal blog