Strict Fusion Summon

A Strict Fusion Summon is a Fusion Summon that can only be conducted with the Fusion Material Monsters listed upon the card. As such, Fusion-Substitute Monsters such as "King of the Swamp" cannot be used as Fusion Material Monsters. Furthermore, these monsters cannot be Summoned with "Instant Fusion". However, using a card that changes its name to that of a correct Fusion Material Monster, such as "Elemental HERO Prisma" or "Phantom of Chaos", that monster can be used as a Fusion Material.

The Condition of being a Strict Fusion Summon Monster does not have effect on being a Nomi Monster, or vice-versa.

In Japanese text, these conditions is written「このカードの融（ゆう）合（ごう）召（しょう）喚（かん）は上（じょう）のカードでしか行（おこな）えない。」(Kono Kādo no Yūgō Shōkan wa Jōki no Kādo de shika Okonaenai)

See also: List of Fusion Monsters with strict Fusion Summoning conditions

Example