Changes

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| kanji = {{Ruby|ＥＸ|エクストラ}}デッキ<br />Formerly: {{Ruby|融|ゆう}}{{Ruby|合|ごう}}デッキ | japanese = ＥＸデッキ<br />Formerly: 融合デッキ | furigana = エクストラデッキ<br />Formerly: ゆうごうデッキ | romaji = Ekusutora Dekki<br />Formerly: Yūgō Dekki | japanese translated = | english = Extra Deck<br />Formerly: Fusion Deck | french = Extra Deck<br />Formerly: Fusion Deck | german = Extradeck<br />Formerly: Fusionsdeck | italian = Extra Deck<br />Formerly: Fusion Deck | korean = 엑스트라 덱 ''Ekseuteura Dek''(Extra Deck)<br />Formerly: 융합 덱 (融合 Deck덱) ''Yunghap Dek''(Fusion Deck) | chinese = 特別牌組 額外卡組 ''Tèbié Páizǔ Éwài Kǎzǔ / Dak6 bit6 Paai4 Ngaak6 ngoi6 Kaat1 zou2''(Extra Deck)<br />Formerly: 融合牌組 融合卡組 ''Rónghé Páizǔ Kǎzǔ / Jung4 hap6 Paai4 Kaat1 zou2''(Fusion Deck) | portuguese = Deck Adicional<br />Formerly: Deck de Fusão | spanish = Deck Extra<br />Formerly: Deck de Fusión

If a Fusion Monster, Synchro Monster, Xyz Monster, or Link Monster would be [[return]]ed to the [[hand]] or [[Main Deck]], it is instead returned to the Extra Deck (face-down), since Fusion Monsters, Synchro Monsters, Xyz Monsters, and Link Monsters cannot exist in the hand or the Main Deck. It is not necessary to [[shuffle]] the Extra Deck, even when a card specifies that the card would be shuffled into the Deck. [[Pendulum Monster]]s and [[Link Monster]]s that are Special Summoned from the Extra Deck must be Special Summoned to a [[Main Monster Zone]] pointed to by a [[Link Monster]] or an [[Extra Monster Zone]]. ==Rule changes==Prior to New Master Rule, Extra Monster Zones did not exist. Monsters Special Summoned from the Extra Deck could be Special Summoned to any appropriate Monster Zone. Under [[New Master Rule]], all monsters that are Special Summoned from the Extra Deck had to be Special Summoned to a [[Main Monster Zone]] pointed to by a [[Link Monster]] or an [[Extra Monster Zone]].

Under Master Rule (April 1, 2020 update)—the current rules, [[Master Rule 4Pendulum Monster]]s and [[Link Monster]], monsters that are s Special Summoned from the Extra Deck must be Special Summoned to a [[Main Monster Zone]] pointed to by a [[Link Monster]] or an [[Extra Monster Zone]]. Prior to the introduction of the Extra Monster Zones and under [[Master Rule 5]], a monster could be Special Summoned from the Extra Deck to any Monster Zone.

** [[Zane Truesdale]]'s Fusion Deck is shown to be mixed in with his Main Deck; on one occasion, he searches his Main Deck for "[[Chimeratech Overdragon (anime)|Chimeratech Overdragon]]" when [[Fusion Summon]]ing it.<ref name="gx ep"65">{{episode|Yu-Gi-Oh! GX|65|ref}}</ref>* In ''[[Yu-Gi-Oh! 5D's]]'', [[Akiza Izinski]] can clearly be seen to have an [[Extra Deck Zone]] built into her Duel Disk. [[Yusei Fudo]] and [[Jack Atlas]]'s Extra Decks are stored with their [[Main Deck]]s; both are shown adding "[[Stardust Dragon (anime)|Stardust Dragon]]" to their Main Decks before a Duel.<ref name="ep45ds ep 4">{{episode|Yu-Gi-Oh! 5D's|4|ref}}</ref><ref name="5ds ep"23">{{episode|Yu-Gi-Oh! 5D's|23|ref}}</ref>