Main Deck

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Main Deck

Japanese (ruby)


Japanese (romanized)

(Mein no) Dekki


(Main) Deck

A Main Deck in the anime

The Main Deck (Japanese: メインのデッキ Mein no Dekki), usually simply referred to as the Deck (デッキ Dekki), is a pile of cards that a Duelist can draw from during play. Each Duelist uses his or her own Main Deck in a Duel.

When constructing a Deck, Monster, Spell and Trap Cards are placed in the Main Deck. Fusion, Synchro, Xyz and Link Monsters are placed in the Extra Deck. If a player uses official Token Monster cards, these are to be stored in a separate location as well.

When a Duel begins, the Main Deck is placed face-down in the Deck Zone of the field. All cards in the Main Deck must remain face-down during the Duel (unless a card effect like "Convulsion of Nature" says otherwise). During a Duel, neither player may view the contents of either player's Deck unless a card effect allows them to, after which the Deck must be shuffled. Even if a card in the Deck is face-up, it cannot be looked at by either player unless it is on top of the Deck, in which case it is public knowledge.

Main Deck construction restrictions

Constructed Deck format

Sealed Deck format

  • The Main Deck must be constructed using only card product provided at the event.
  • The Main Deck can have a minimum of 20 cards. There is no maximum size.
  • A Duelist may include as many copies of any card he or she likes, even more than three.