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{{Infobox/Archetype/StartRedirect| image name = Main Deck.png| image size = 150 pxthe type of set| image caption = A Main Starter Deck in the anime}}{{Infobox/Archetype/ExtendedName| furigana = メインのデッキ| romaji = Mein no Dekkiand| english = Main Structure Deck| french = Main a list of Decksets| german = Main DeckTemplate:Decks}}| italian = [[File:Main Deck.png| korean = 메인 덱 ''Mein Dek''thumb| chinese = 牌組 ''Páizǔ / Paai4 zou2''| portuguese = A Main Deck Principal| spanish = Deck Principal}}{{Infobox/Archetype/End}}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{{NoteTag|Sometimes written as "山札" in the anime and manga.}} ''Dekki''), is a pile of cards that a [[Duelist]] can [[Draw a card|draw]] from during play. Each Duelist uses his or her own Main Deck in a Duel.
When constructing a Deck, [[Monster Card|Monster]], [[Spell Card|Spell]] , and [[Trap Card]]s are placed in the Main Deck. [[Fusion Monster|Fusion]], [[Synchro Monster|Synchro]], [[Xyz Monster|Xyz]] , and [[Link Monster]]s are placed in the [[Extra Deck]]. If a player uses official [[Monster Token]], [[Counter]], or [[Field Center Card|Field Center]] cards, these are to must be stored in a separate location separately 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 [[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 [[shuffle]]d. Even if a card in the Deck is [[face-up]], it cannot be [[look]]ed at by either player unless it is on top of the Deck, in which case it is [[public knowledge]].
==Main Deck construction Construction restrictions=====''TCG''/''OCG''===
* The Main Deck must contain only [[Legal]] cards.
** [[Extra Deck]] cards cannot be placed in the Main Deck.
** [[Monster Token|Token ]], [[Counter]], and [[Field Center Card|Field Center]]s cards are not placed in any Deck.
====Master Duel=========Constructed Deck format=====
* The Main Deck must contain 40 to 60 cards.
* Up to three copies of any [[Unlimited]] card can be included across the player's Main Deck, [[Side Deck]], and [[Extra Deck]] (combined).
** Up to 1 of each [[Limited]] card and up to 2 of each [[Semi-Limited]] card may be included in the player's Decks. [[Forbidden]] and [[Illegal]] cards cannot be included.** Cards which have their name that are [[Permanently treated as alternate name|permanently treated as having a different name]] are considered to be the same as that card for deck construction. Cards that are [[Treated as multiple names|permanently treated as having multiple names]] are counted as both all of those names.
=====[[Sealed Format]]=====
* The 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.
* There is no limit on the number of cards with the same name that can be included in the player's Decks.
====[[Speed Duel]]====
* The Deck may only contain cards with the [[Speed Duel Logo]].
* Up to three copies of any [[Unlimited]] non-Skill Card can be included across the player's Main Deck, [[Side Deck]], and [[Extra Deck]] (combined). Additionally, the player can include up to one Skill Card with their Deck (although Skill Cards are not placed in a Deck).
** Even in Speed Duel Sealed Format, the Main Deck must still contain 20 to 30 cards.<ref>[https://img.yugioh-card.com/en/downloads/penalty_guide/Speed_Duel_Addendum_1.2_KDE-US.pdf Official KDE-US Yu-Gi-Oh! TRADING CARD GAME Tournament Policy Speed Duel Addendum] (March 11, 2022): IV. Sealed Deck Information</ref>
===[[Yu-Gi-Oh! Rush Duel]]===
* The Main Deck must contain only ''Yu-Gi-Oh! Rush Duel'' cards.
** [[Fusion Monster]]s cannot be placed in the Main Deck.
* The Main Deck and Extra Deck combined can contain a maximum of 1 Legend Card of each card type ([[Monster Card|Monster]], [[Spell Card|Spell]], and [[Trap Card|Trap]]).<ref name="YGOrg 10-31-22">{{cite web | url = https://ygorganization.com/rush-duel-change-to-how-legends-work/ | title = <nowiki>[RUSH DUEL] Change To How Legends Work</nowiki> | author = NeoArkadia | website = The Organization | date = October 31, 2022 | accessdate = October 31, 2022}}</ref>
== In other languages =={{In other languages| fr_name = Main Deck| de_name = Main Deck| it_name = Main Deck| pt_name = Deck Principal| es_name = Deck Principal| ja_name = メインのデッキ| ja_romaji = Mein no Dekki| ko_name = 메인 덱| ko_rr = Mein Dek| tc_name = 牌組| tc_pinyin = Páizǔ|sc_name=主牌组|sc_pinyin=Zhǔpáizǔ}} ==Notes==
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==References=={{reflist}}<references />
{{Gameplay}}
[[Category:Gameplay]]
