"Mekk-Knight", known as "Jack-Knights" (ジャックナイツ, Jakkunaitsu) in the OCG, is an archetype of LIGHT monsters debuting in Extreme Force. The archetype is both related to and supported by the "World Legacy" archetype. All of its Main Deck members are Psychic monsters, while its Extra Deck members each have a different Type.

Although the Japanese name of the "Mekk-Knight" archetype is only ジャックナイツ, its members' names are actually consist the words 機界騎士ジャックナイツ. Disregarding the kana, these words could be read as Kikai Kishi, literally "Mecha-World Knight", which could be a pun on the monster Type 機械 Kikai.


This archetype is related to the "World Legacy" and "World Chalice" archetypes, as shown in the artwork of "World Legacy Key" and "World Legacy Scars".

Each Main Deck monster has a color of the rainbow that appears in the artworks of "Mekk-Knight Spectrum Supreme" and "World Legacy Pawns".

Their names were mostly based on sky's phenomenon and other astrological-related objects.


Color Mekk-Knight
Red Red Moon
Orange Orange Sunset
Yellow Yellow Star
Green Green Horizon
Blue Blue Sky
Indigo Indigo Eclipse
Violet Purple Nightfall
Visible spectrum Spectrum Supreme
N/A Avram
Morning Star

Playing style

All "Mekk-Knight" Main Deck monsters (except "Mekk-Knight Avram") share the following effect:

  • "If 2 or more cards are in the same column, you can Special Summon this card (from your hand) to that column."

The deck itself relies on Special Summoning, doing so in orderly fashion to take advantage of their column-based effects. They can also modify their formation to fit almost every situation at will, mostly to enable the negation effects of "World Legacy Key", "World Legacy Whispers", and "World Legacy's Secret". "Mekk-Knight Blue Sky" and "Mekk-Knight Purple Nightfall" is the most important monsters within the deck due to their search effects, and together with "World Legacy's Memory", allows them to keep Summoning monsters without pause and use them to either Link Summoning, or straight-up inflicting damage. Due to how this deck's mechanic works, this deck can performs better when going second.

Most iteration of the deck also employs "Aleister the Invoker" (along with "Invocation", "Magical Meltdown", and the "Invoked" Fusion Monsters), not only to increase their offensive power but also to better safeguarding their field presence (courtesy of "Invoked Mechaba"). Other than that, this deck's core components (consisting of "Blue Sky", "Purple Nightfall", and "Indigo Eclipse") can also be used in other decks that needs more swarming and offensive power.

Recommended Cards

Recommended cards

Official Decklist

Konami's "Mekk-Knight" Deck[1]