Spectrum Monster

Spectrum Monsters (スペクトラムモンスター, Supekutoramu Monsutā) are new monsters created by Taylor Gorrell, though what he plans to do with them is currently unknown. These cards reside in the Extra Deck and are Summoned by Spectrum Summon. Spectrum Monsters have rainbow-colored card frames.

Spectrum Monsters are unique in that they require no Material Monsters whatsoever to be Spectrum Summoned. They are instead Summoned using the players' Life Points as the payment, done when the user has a complete Spectrum Wheel.

Spectrum Monsters do not have Levels. Instead, they have Wavelengths.

The name "Spectrum Monsters" derives from the Spectrum Wheel's seven Spectrum Pieces, which are the colors of the rainbow, as well as their rainbow-colored card frames.