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- Contact Fusion is not a Fusion Summon, as it is a type of built-in Special Summon. Attempting to Special Summon via Contact Fusion opens the Summon negation window and does not start a Chain.
- All Fusion Materials involved in the Special Summon must be on the side of the field of the player conducting the Contact Fusion (unless specified otherwise), and cannot be replaced by Fusion Substitute Monsters.
- If using a face-down monster as a Fusion Material for a Contact Fusion that returns it to the Deck, the player conducting the Summon must reveal that monster before shuffling it into the Deck to allow your opponent to verify the card's identity.
- Much like all Extra Deck monsters, most Fusion Monsters that use Contact Fusion can be Special Summoned from the Graveyard or the Banished Zone, as long as they were successfully Special Summoned from the Extra Deck via Contact Fusion first. (Like all Extra Deck monsters, this does not apply if the monster is returned to the Extra Deck; in that case, the monster must be Special Summoned via Contact Fusion again.)
The first instances of this Summon were in the original Yu-Gi-Oh! manga, where specific monsters could be fused into a Fusion Monster without the use of "Polymerization". The first monster that was Summoned in this manner was "Valkyrion the Magna Warrior". Unlike Fusion by "Polymerization", monsters created by this method could attack in the same turn they were created.
This term was first widely introduced in Power of the Duelist, and was originally a term from the Yu-Gi-Oh! GX anime used to describe the Special Summoning method of the "Neos" Fusion Monsters, which are Summoned by shuffling their Fusion Material Monsters from the field into the Deck. This term was later applied to the "Gladiator Beast" Fusion Monsters by players, as those monsters Special Summon themselves via the same method.
This Special Summon can be considered to be a precursor to Synchro Summoning and Xyz Summoning, as it only requires the proper monsters on the field and the appropriate monster in the Extra Deck, without the need of a Spell Card (as used in most Ritual Summons and Fusion Summons).
All "Contact Fusion" cards
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