The Extra Deck (previously referred to as "Fusion Deck") is a Deck where Fusion Monsters and Synchro Monsters are stored during a Duel. They are separate from the Main Deck, and you can search through it to find a Fusion Monster or Synchro Monster that you need. There is a 15-card limit to the Extra Deck, regardless of how many Fusion Monsters and/or Synchro Monsters you include. The "Maximum of 3 Rule" for cards of the same name still applies.
If a Fusion Monster or Synchro Monster on the field, in the Graveyard or Removed from Play is returned to its owner's hand or Deck, it is instead sent to the Extra Deck, since Fusion Monsters and Synchro Monsters cannot exist in either the hand or the Main Deck.
The contents of your Extra Deck are not public knowledge to your opponent, and only you may look through its contents.
Any card or card effects referring to the Fusion Deck still count the Extra Deck.
Monster Cards - Spell Cards - Trap Cards Types of Monster Cards Effect - Fusion - Normal - Ritual - Synchro - Dark Synchro Types of Spell Cards Continuous - Field - Equip Types of Trap Cards Continuous - Counter - Normal Other Types of Card Manga Cards Virus - Trap-Spell Equip Trap Cards - Field Trap Cards Turn Phases Draw Phase - Standby Phase - Main Phase 1 |
ATK - DEF - Level - Attribute - Type Playing Field Zones Monster Zones - Spell/Trap Zones Types of Summon Flip - Normal - Tribute | Activate - Chain - Costs - Counters - Destroy Types of Monster Effects Continuous - Flip - Ignition - Quick Compulsory - Optional - Lingering Types of Effect Monsters Flip - Gemini - Spirit - Toon - Tuner - Union - Dark Tuner Types of Spell Speed | Tournament Guidelines Duel - Infinite Loop - Maintenance Costs Double Tributer - Victory Conditions Attributes DARK - EARTH - FIRE - LIGHT - WATER - WIND Types Aqua - Beast - Beast-Warrior - Dinosaur |