Fusion Monster Fusion Monsters ( Japanese : モンスター " Yūgō Monsutā " ) are a type of Monster Card . The color of their card frame is violet . These cards are placed in the Extra Deck . To be properly Special Summoned , Fusion Monsters must first be Fusion Summon ed ( unless otherwise specified ) . If they leave the Extra Deck without being properly Special Summoned , they cannot be Special Summoned while they are banished or in the Graveyard . Most Fusion Monsters have a set of Fusion Material s , which are listed on the first line of the card ' s text . These are the material s used to perform the Summon of that monster . Like other Extra Deck monsters , Fusion Monsters cannot exist in the hand or Main Deck ( even with card effects ) . If a Fusion Monster would be moved to the hand or Main Deck , it is returned to the Extra Deck instead . If a card like " Transmigration Break " or " Degenerate Circuit " is applying , this will override the Fusion Monster ' s ability to return to the Extra Deck . History . Originally , the only way to properly summon a Fusion Monster was through a Fusion Summon involving the required Fusion Material s and the Spell Card " Polymerization " . There are now many different ways to Fusion Summon a monster and many different cards that allows the player to Fusion Summon . In " Yu - Gi - Oh ! 5D ' s " and " Yu - Gi - Oh ! ZEXAL " , Fusion Monsters were seen rarely , seemingly being replaced by Synchro and Xyz Monster s in those respective series . With " Duel Terminal - Pulse of the Trishula ! ! " , Fusion Monsters started to come back , starting with " Naturia Exterio " . In " Duelist Revolution " , " Starstrike Blast " and " The New Challengers " , 5 more Fusion Monsters were added : " Ultimate Axon Kicker " , " Dragon Knight Draco - Equiste " , " Gaia Drake , the Universal Force " , " Supreme Arcanite Magician " , and " Naturia Gaiasteleoh " . These six Fusions are the next evolution of Fusion Monsters . The first evolution was the standard Fusion , requiring two regular Monsters , such as with " Flame Swordsman " . The second evolution of Fusions Monsters require at least one other Fusion Monster , such as " Dragon Master Knight " . The third evolution requires at least 1 Synchro Monster such as " Gaia Drake , the Universal Force " . As of " Duelist Alliance " , it was announced that Fusion , Synchro , Xyz , and Ritual Monsters would be getting an equal amount of support , and since then , Fusion Monsters have been plentiful in core booster sets , sometimes even outnumbering the other two Extra Deck types . The first Fusion Tuner , " Sea Monster of Theseus " , was introduced in the TCG version of " Raging Tempest " . The first Fusion Pendulum Monster , " Supreme King Z - ARC " , was introduced in " Maximum Crisis " . Playing style . Compared to Synchro , Xyz , and Link , Fusion ' s main weakness is the need of the " Polymerization " card , meaning that the player ' s ability to Fusion Summon is usually limited by the number of " Polymerization " they have and on having the card in their hand or on the field . Additionally most Fusion Monsters list specific monsters as Fusion Materials , meaning they are less flexible in which monsters can be used to Fusion Summon . Due to needing " Polymerization " in addition to at least two materials ( Transformation Summon ing notwithstanding ) , Fusion Summoning will usually cost the player a large number of cards in hand and field . However , a key advantage Fusion Summoning has over Synchro , Xyz , and Link Summoning is that monsters in the player ' s hand can be used as Fusion Materials , thus removing the need to spend more resources summoning those materials in most cases . Many Fusion Summon oriented archetype s have their own versions of " Polymerization " ; most of which can be searched and recycled , allowing the player to reuse them multiple times and perform more Fusion Summons . In the manga . In the original and " R " manga , the Fusion Material Monsters must exist on the field to be fused with " Polymerization " , and once they are fused , they are still treated as separate cards for the purpose of specific card effects ( most famously , " The Wicked Eraser " , which treated the 3 - Material " Arcana Knight Joker " as 3 cards and gained 3000 ATK ) . In addition , they can also be treated as a number of Tribute s equal to this total ; as demonstrated in " Yu - Gi - Oh ! R " , less than the total can be Tributed ( Seto Kaiba Tributed the " Material Bat " and " Material Scorpion " portions of his " Mosaic Manticore " while leaving " Material Lion " on the field ) . However , the Fusion Materials can also be Summoned while the Fusion Monster is on the field , demonstrated in " R " when Yako Tenma Summoned 3 " Blue - Eyes White Dragon s " with " Junk Dealer " while Seto Kaiba had his " Blue - Eyes Ultimate Dragon " on the field . They are treated as having a Level equal to the highest Level of the Fusion Material Monsters ( " Mosaic Manticore " , made up of of the Level 4 " Material Lion " , " Material Bat " and " Material Scorpion " was treated as Level 4 , while " Beast Machine King Barbaros Ür " , composed of the Level 4 " Machine Lord Ür " and the Level 8 " Beast King Barbaros " was treated as a Level 8 monster ) . Fusion Monsters are also treated as having the same name as their Fusion Materials , as seen when Dark Marik is able to target " Immortal God Slime " with " Jam Defender " . Under the " Super - Expert Rules " , Fusion Monsters cannot attack during the turn they are Summoned ( a condition carried over to the Duelist Kingdom and Battle City Rules in the anime ) . However , Fusion Monsters that were Fusion Summoned without " Polymerization " , like " Valkyrion the Magna Warrior " , " XYZ - Dragon Cannon " , and " Mosaic Manticore " , are not subject to this condition . In the " GX " manga and all subsequent manga , Fusion Monsters were treated like they are in the " TCG " / " OCG " . In the anime . In the anime , the Millennium Scale was the item which originally fused monsters . In the early " Yu - Gi - Oh ! " anime , Fusion Monsters had low ATK and DEF and very few had effects . In " Yu - Gi - Oh GX " , many powerful Fusion Monsters were introduced . In " Yu - Gi - Oh 5D ' s " and " Yu - Gi - Oh ! ZEXAL " , Synchro Monster s and Xyz Monster s , respectively , mostly overtook this role , although Fusion Monsters do still appear . In " Yu - Gi - Oh ! ARC - V " , Fusion Monsters are primarily used by characters from the Standard and Fusion Dimension s . Fusion Monsters are the only kind of Extra Deck monster to have appeared in all five of " Yu - Gi - Oh ! " , " GX " , " 5D ' s " , " ZEXAL " and " ARC - V " . In Yu - Gi - Oh ! BAM . Like " Yu - Gi - Oh ! " , Fusion Monsters in Yu - Gi - Oh ! BAM have purple - colored background . But unlike the real TCG , Fusion Monsters can be played independently , or can be overlayed with an existing monster to produce a new Monster hidden within that Card . Fusing 2 monsters together will trigger an effect aside from creating a new Monster ( i . e . : Gaining Life Points , Inflicting Damage , etc . ) . When the Fusion Monster produced is destroyed , the two materials used for Fusion are also destroyed .