Debuting in Japan in 1999 and the rest of the world in 2002, the Yu-Gi-Oh
That honor is held by the Worlds Smallest Magic: The Gathering Exclusive Collector Set pictured above - a painfully adorable, now sadly discontinued joke product that included two itsy-bitsy duel decks composed of downsized, 1.2 x 1.8 inch cards, as well as teeny weeny spindown dice
FACTORY SEALED FROM THE ORIGINAL OWNER AND CONTAINS 36 FACTORY SEALED PACKS ESTIMATE $15000 - $20000
Esper decks answer everything, eventually winning through superior card advantage and inevitability
With Gravekeepers Servant face-up on the field, any time your opponent attacks, they must discard the top card from their deck to the graveyard
But this Dimir land looks like an incredible enabler for all manner of self-mill commanders like Muldrotha, the Gravetide