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
There are cards with infect in all four of the creatures colors, making it easy to incorporate them as well as creatures with toxic for a formidable poison counters deck build
While the sky is limitless with this card, do make sure you can Storm off a reasonable amount to make Radstorm worth including in your deck
The second set titled Rise of the Floodborn has arrived, featuring 204 new cards to add to those found in The First Chapter
The set came with a unique booster pack type: beyond boosters, and incredible art cards alongside Secret Lairs called Da Vinci's Designs and Lethal Legends
Any land you play or spell you cast now draws you a card