Fusion Summoning condition

All Fusion Monsters that do not include contrary summon conditions must be Fusion Summoned properly first, or else they cannot be Special Summoned again from the Graveyard or Removed from Play Zone.

This card cannot be Special Summoned except by Fusion Summon.
Blanket statement; used predominantly on Elemental Heroes. This means that, even if you Fusion Summon the card correctly first, you cannot Special Summon it again afterwards. This also means you cannot use cards such as Metamorphosis or Cyber-Stein to directly Special Summon the Fusion Monster(s) from the Fusion Deck.

A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters.
This means that, for a Fusion Summon to take place with this card, you must use the Fusion Material Monsters listed on the card, you cannot subsitute. However, if there are no further summon conditions, you can still Special Summon the monster directly from the Fusion Deck with cards such as Metamorphosis or Cyber-Stein. You may also use cards whose effects change their names, such as Elemental Hero Prisma.