As a staple that is splashed into several decks, "Effect Veiler" is a viable Fusion Material for this card.
As a LIGHT Thunder-Type monster, "Thunder Dragon" can be used as a Fusion Material for both this card and "Gem-Knight Prismaura". "Vylon Prism" is another monster with this characteristic, and if it is in the Graveyard, can be equipped to the newly Summoned Fusion Monster for a sizable ATK increase when that monster battles.
In addition to being a LIGHT monster and potential Fusion Material for this card, "Elemental HERO Prisma" can be used to thin the deck with its effect by sending "Gem-Knight" Normal Monsters that are specifically listed as Fusion Materials on "Gem-Knight" Fusion Monsters from the Deck to the Graveyard, reducing the chance that you might dead draw them. The sent "Gem-Knight" Normal Monsters can later be banished to retrieve "Gem-Knight Fusion" from the Graveyard or as Fusion Materials for a Fusion Monster Fusion Summoned via "Fragment Fusion". "Crystal Rose", a "Gem-Knight" support card, can also fulfill this role, however, it is less restricted than "Prisma" in that it can send any "Gem-Knight" monster from the hand or Deck to the Graveyard.
This card can greatly assist the Gemini "Gem-Knights".
Use "Scroll of Bewitchment" to change the Attribute of a monster you control to LIGHT to aid in this card's Fusion Summon.