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
The likely reason it only sees play in 19,100 decks according to EDHREC is simply that the card is old
Neither survives modern bot detection
With Choco, you get cards and lands from your library while you attack with birds, so Battle Screech becomes your friend
Sigarda, Champion of Light features Midnight Hunt s coven mechanic, checking to see if you have three creatures with different powers whenever you attack to dig through the top of your library for a human card
Foil $39.99): This Artist Series set celebrates the artwork of D&D artist Jesper Ejsing