mtg tutor card Worldly Proxy – Gilded Goblet then shuffle and put that card on top. Demonic Tutor (Borderless Alternate Art)

Nevertheless, they made the cut for the Multiverse Legends bonus sheet thanks to fitting the rather restrictive criteria

It's heavily played in Token, Aggro, Blink, Goblin, and more brews

ARTICLE 1996 World Champion and Shichifukujin Dragon, Rarest Trading Cards in the Guinness Book of World Records 2012

You need graveyard hate (most loops use resources from there) and land interaction and, ideally, ways to stop your opponent from playing Lumra

Sadly, the older codes from these decks have now expired, and the decks themselves are very difficult to come by (they're all unavailable on Amazon US and UK) - so you'll struggle to find an unopened copy with an intact code for a reasonable price