merlin yugioh card 6 More Merlins - Realistic Cards All cards will be carefully packed for safe transit. Merlin - Yugipedia

As some people pointed out, there are still potential workarounds to the limit, although it won't be as easy as just grabbing the entire stock and checking out all at once

First of all, you get the 6 mana investment of a card each turn

Kamigawa: Neon Dynasty introduced several new card variants at different rarities, making opening many of these special variants exceedingly hard to achieve

Most require you to have both halves in play, like Brisela, but others may require both halves to attack (like Mishra, Claimed by Gix), or have a certain amount of cards in your graveyard (like Titania, Voice of Gaea)

Deck : Each player starts with their own deck of 60 cards

The Plastic Wrap Sounds stupid, but trust me