52 Deck is an unlockable pickup in Fiend Folio, a mod for The Binding of Isaac.

Spawns 2-3 of the following cards:
• Any "Jack of X" card.
• Any "Three of X" card.
• Any "Queen of X" card.
• Any "2 of X" card.
• Any "Ace of X" card.
• Joker
• Suicide King

Win at the same Poker Table 3 times.

• Check out the pickup description on the mod's external Wiki.
• Download Fiend Folio from the Steam Workshop.