All images have been edited by me. Original images are from Jazin Kay's Archive, unless otherwise stated.
MONSTERS
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 3 "Spectrum Knight" monsters you control. The Attribute of this card is also treated as EARTH, WATER, FIRE, WIND, and DARK. When this card is Summoned, Special Summon up to 4 "Spectrum Token"s (Insect-Type/LIGHT/Level 4/ATK 1900/DEF 0) in face-up Attack Position. As long as you control a "Spectrum Token", this card cannot be selected as an attack target.
Once per turn, you can destroy 1 Spell or Trap Card on the field and select 1 monster on the field. Inflict damage to your opponent equal to the selected monster's Level x200. While this card is in the Graveyard, you can Tribute 1 "Primary Spectrum Knight" monster you control to Special Summon this card.
The ATK and DEF of this card are equal to the number of "Primary Spectrum Knight" monsters you control x700. If this card's ATK is 1400 or less, this card can attack your opponent directly. If the ATK of this card is higher than 1400, during battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.
When this card is Summoned, change it to Defense Position. When this card is selected as an attack target, switch this card to Attack Position. While this card is in Attack Position, select 1 monster you control. The ATK of this card becomes equal to the Level of the selected monster x500.
When this card is Normal Summoned, you can select 1 "Primary Spectrum Knight" monster you control and equip it to this card as an Equip Card. This card gains ATK equal to the Level of the equipped monster x100.
This card cannot be destroyed by battle. During either player's Battle Phase, if you control no monsters, you can Special Summon this card from your Graveyard in face-up Attack Position. If you do, destroy this card at the end of the Battle Phase.
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by destroying 1 card you control. The original ATK of this card is 2800. This card cannot declare an attack. Once per turn, you can destroy 1 monster your opponent controls, and inflict damage to your opponent equal to the Level of the destroyed monster x200. When this card is destroyed, destroy 1 card your opponent controls.
"This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it be treated as an Effect Monster with this effect:
● Once per turn, select 1 "Spectrum Knight" monster you control and equip it to this card as an Equip Card. This card gains ATK equal to the ATK of the equipped monster. Each time this card battles while equipped with the selected monster, reduce the ATK of this card by 500. If the ATK of this card is lower than its original ATK, destroy this card.
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play 1 "Secondary Spectrum Knight - Violet the Allure" you control. When this card is Summoned, select 1 monster on the field and equip it to this card as an Equip Card. This card's ATK and DEF are equal to the ATK and DEF of the equipped monster. If the equipped monster is destroyed, send this card to the Graveyard. If this card is removed from the field, destroy the equipped monster.
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 "Primary Spectrum Knight - Red the Archer" you control. When this card is Summoned, select 1 monster in either player's Graveyard. While that card remains in the Graveyard, the ATK and DEF of this card becomes equal to the ATK and DEF of the selected monster. If this card would be destroyed by a card effect, you can remove from play the selected monster.
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 "Full Spectrum Knight - Rainbow the Emperor" while this card is in the Graveyard. During your End Phase, you can discard this card to add 1 "Spectrum Knight" monster from your Deck to your hand. Once per turn, you can select 1 monster on the field. Switch the ATK and DEF of the selected monster until the End Phase.
"Primary Spectrum Knight - Red the Archer" + "Primary Spectrum Knight - Yellow the Volt"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) Once per turn, you can equip this card to a "Spectrum Knight" you control, OR unequip it to Special Summon this card in face-up Attack Position. Once per turn, while equipped to a monster by this effect, the equipped monster can attack your opponent directly. Any battle damage this card inflicts to your opponent is halved. (A monster can only by equipped with 1 Union Monster at a time. If the equipped monster would be destroyed, destroy this card instead.)
"Primary Spectrum Knight - Yellow the Volt" + "Primary Spectrum Knight - Blue the Torrent"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) When this card is Summoned, return 1 card on the field to its owner's hand. Once per turn, change the battle position of 1 monster on the field. During your Main Phase 2, you can Tribute this card to return all cards on the field to the top of their owner's Deck and have both players draw cards until they have 5 cards in their hand. Then, if you drew a "Spectrum Knight" monster, you can Special Summon it.
"Primary Spectrum Knight - Red the Archer" + "Primary Spectrum Knight - Blue the Torrent"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) When this card is Summoned, if you control another "Secondary Spectrum Knight" monster, gain 1000 Life Points. A monster that battles with this card is destroyed at the end of the Damage Step. Once per turn, select 1 monster your opponent controls. During your opponent's next turn, the selected monster cannot declare an attack or activate its effect. When this card is destroyed, take 1000 damage.
1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can Special Summon 1 "Spectrum Knight" monster from your hand. Once per turn, place 1 Yin Counter on this card. You can remove 3 Yin Counters from this card to destroy 1 card on the field. While this card has 10 or more Yin Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - Black the King" from your Extra Deck.
[spoiler=Look here if you can't read it...]1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can Special Summon 1 "Spectrum Knight" monster from your hand. Once per turn, place 1 Yin Counter on this card. You can remove 3 Yin Counters from this card to destroy 1 card on the field. While this card has 10 or more Yin Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - Black the King" from your Extra Deck.
1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can discard 1 "Spectrum Knight" monster to remove from play 1 card on the field. Once per turn, place 1 Yang Counter on this card. you can remove 3 Yang Counters from this card to send the top 5 cards of either player's Deck to the Graveyard. While this card has 10 or more Yang Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - White the Queen" from your Extra Deck.
SPELLS
All "Spectrum Knight" monsters you control gain 500 ATK. Once per turn, if you control a "Primary Spectrum Knight" monster, you can Special Summon 1 "Spectrum Knight" monster from your hand. If this card would be destroyed, you can Tribute 1 "Spectrum Knight" monster you control instead.
Activate only when you control 5 different "Spectrum Knight" monsters. Pay 1000 Life Points and destroy all cards your opponent controls. You cannot conduct your Battle Phase during the same turn you activate this card.
TRAPS
MONSTERS
EN000:Full Spectrum Knight - Rainbow the Emperor :
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 3 "Spectrum Knight" monsters you control. The Attribute of this card is also treated as EARTH, WATER, FIRE, WIND, and DARK. When this card is Summoned, Special Summon up to 4 "Spectrum Token"s (Insect-Type/LIGHT/Level 4/ATK 1900/DEF 0) in face-up Attack Position. As long as you control a "Spectrum Token", this card cannot be selected as an attack target.
EN001: Primary Spectrum Knight - Red the Archer :
Once per turn, you can destroy 1 Spell or Trap Card on the field and select 1 monster on the field. Inflict damage to your opponent equal to the selected monster's Level x200. While this card is in the Graveyard, you can Tribute 1 "Primary Spectrum Knight" monster you control to Special Summon this card.
EN002: Primary Spectrum Knight - Yellow the Volt :
The ATK and DEF of this card are equal to the number of "Primary Spectrum Knight" monsters you control x700. If this card's ATK is 1400 or less, this card can attack your opponent directly. If the ATK of this card is higher than 1400, during battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.
EN003: Primary Spectrum Knight - Blue the Torrent :
When this card is Summoned, change it to Defense Position. When this card is selected as an attack target, switch this card to Attack Position. While this card is in Attack Position, select 1 monster you control. The ATK of this card becomes equal to the Level of the selected monster x500.
EN004: Trimary Spectrum Knight - Indigo the Ocean :
When this card is Normal Summoned, you can select 1 "Primary Spectrum Knight" monster you control and equip it to this card as an Equip Card. This card gains ATK equal to the Level of the equipped monster x100.
EN005: Trimary Spectrum Knight - Vermilion the Phoenix :
This card cannot be destroyed by battle. During either player's Battle Phase, if you control no monsters, you can Special Summon this card from your Graveyard in face-up Attack Position. If you do, destroy this card at the end of the Battle Phase.
EN006: Trimary Spectrum Knight - Chartreuse the Rampage :
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by destroying 1 card you control. The original ATK of this card is 2800. This card cannot declare an attack. Once per turn, you can destroy 1 monster your opponent controls, and inflict damage to your opponent equal to the Level of the destroyed monster x200. When this card is destroyed, destroy 1 card your opponent controls.
EN007: Trimary Spectrum Knight - Magenta the Electronic :
"This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it be treated as an Effect Monster with this effect:
● Once per turn, select 1 "Spectrum Knight" monster you control and equip it to this card as an Equip Card. This card gains ATK equal to the ATK of the equipped monster. Each time this card battles while equipped with the selected monster, reduce the ATK of this card by 500. If the ATK of this card is lower than its original ATK, destroy this card.
EN010: Light Spectrum Knight - Ultraviolet the Spirit :
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by removing from play 1 "Secondary Spectrum Knight - Violet the Allure" you control. When this card is Summoned, select 1 monster on the field and equip it to this card as an Equip Card. This card's ATK and DEF are equal to the ATK and DEF of the equipped monster. If the equipped monster is destroyed, send this card to the Graveyard. If this card is removed from the field, destroy the equipped monster.
EN011: Light Spectrum Knight - Infrared the Shapeshifter :
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 "Primary Spectrum Knight - Red the Archer" you control. When this card is Summoned, select 1 monster in either player's Graveyard. While that card remains in the Graveyard, the ATK and DEF of this card becomes equal to the ATK and DEF of the selected monster. If this card would be destroyed by a card effect, you can remove from play the selected monster.
EN012: Full Spectrum Knight - Rainbow the Inverted :
This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by Tributing 1 "Full Spectrum Knight - Rainbow the Emperor" while this card is in the Graveyard. During your End Phase, you can discard this card to add 1 "Spectrum Knight" monster from your Deck to your hand. Once per turn, you can select 1 monster on the field. Switch the ATK and DEF of the selected monster until the End Phase.
EN040: Secondary Spectrum Knight - Orange the Chariot :
"Primary Spectrum Knight - Red the Archer" + "Primary Spectrum Knight - Yellow the Volt"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) Once per turn, you can equip this card to a "Spectrum Knight" you control, OR unequip it to Special Summon this card in face-up Attack Position. Once per turn, while equipped to a monster by this effect, the equipped monster can attack your opponent directly. Any battle damage this card inflicts to your opponent is halved. (A monster can only by equipped with 1 Union Monster at a time. If the equipped monster would be destroyed, destroy this card instead.)
EN041: Secondary Spectrum Knight - Green the Typhoon :
"Primary Spectrum Knight - Yellow the Volt" + "Primary Spectrum Knight - Blue the Torrent"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) When this card is Summoned, return 1 card on the field to its owner's hand. Once per turn, change the battle position of 1 monster on the field. During your Main Phase 2, you can Tribute this card to return all cards on the field to the top of their owner's Deck and have both players draw cards until they have 5 cards in their hand. Then, if you drew a "Spectrum Knight" monster, you can Special Summon it.
EN042: Secondary Spectrum Knight - Violet the Allure :
"Primary Spectrum Knight - Red the Archer" + "Primary Spectrum Knight - Blue the Torrent"
This card can only be Special Summoned from the Extra Deck by returning the above Fusion Material Monsters from the field to the Deck. (You do not use "Polymerization".) When this card is Summoned, if you control another "Secondary Spectrum Knight" monster, gain 1000 Life Points. A monster that battles with this card is destroyed at the end of the Damage Step. Once per turn, select 1 monster your opponent controls. During your opponent's next turn, the selected monster cannot declare an attack or activate its effect. When this card is destroyed, take 1000 damage.
EN043: Elite Spectrum Knight - White the Queen :
1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can Special Summon 1 "Spectrum Knight" monster from your hand. Once per turn, place 1 Yin Counter on this card. You can remove 3 Yin Counters from this card to destroy 1 card on the field. While this card has 10 or more Yin Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - Black the King" from your Extra Deck.
[spoiler=Look here if you can't read it...]1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can Special Summon 1 "Spectrum Knight" monster from your hand. Once per turn, place 1 Yin Counter on this card. You can remove 3 Yin Counters from this card to destroy 1 card on the field. While this card has 10 or more Yin Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - Black the King" from your Extra Deck.
EN044: Elite Spectrum Knight - Black the King :
1 "Primary Spectrum Knight" Tuner + 2 or more non-Tuner monsters
When this card is Synchro Summoned, you can discard 1 "Spectrum Knight" monster to remove from play 1 card on the field. Once per turn, place 1 Yang Counter on this card. you can remove 3 Yang Counters from this card to send the top 5 cards of either player's Deck to the Graveyard. While this card has 10 or more Yang Counters, you can Tribute this card to Special Summon 1 "Elite Spectrum Knight - White the Queen" from your Extra Deck.
SPELLS
EN020: Palette Tree :
All "Spectrum Knight" monsters you control gain 500 ATK. Once per turn, if you control a "Primary Spectrum Knight" monster, you can Special Summon 1 "Spectrum Knight" monster from your hand. If this card would be destroyed, you can Tribute 1 "Spectrum Knight" monster you control instead.
EN021: Supreme Rainbow Cannon :
Activate only when you control 5 different "Spectrum Knight" monsters. Pay 1000 Life Points and destroy all cards your opponent controls. You cannot conduct your Battle Phase during the same turn you activate this card.
TRAPS