"IXyz" an abbreviation of "Imperial Xyz", abbreviated "IX" Inperiaru Ekushīzu), is an Archetype of monsters that can be Xyz Summoned by Chaos Xyz Evolution, with the effect of "Rank-Up-Magic Royal Fire Formation - Kogumaza", and is closely tied to the "Fire Fist" archetype. They have been primarily used by Naoki Saotome in his Deck. These monsters are created through the elemental power of FIRE to improve FIRE and Beast-Warrior-Type Xyz Monsters.

Xyz Materials attached to "IXyz" monsters resemble hexagonal plates of golden armor, and are called "Kikko Xyz Materials". Like monsters that can utilize Chaos Xyz Evolution, these monsters require an additional Xyz Material but with 1 higher Level in a regular Xyz Summon, since they themselves are 1 Rank higher than their respective original counterparts.

"IXyz" monsters are shown as being either in front of a golden palace or castle, or with a golden army, poised and ready for battle. Furthermore, all "IXyz" monsters are clad in Oriental armor, more specifically resembling Japanese samurai. In juxtaposition to the "CXyzs'" glowing red lines, "IXyz" monsters have glowing golden lines across their body that glow even brighter when they attack.

Due to their connection to the "Fire Fist" and "Fire Formation" archetypes, "IXyzs" have effects that protect other cards you control, usually in the backrow, or can be used to draw upon additional resources, representing Naoki's drive to "burn" through his Deck to defeat his foes. Because of this, "IXyzs" form a perfect counter against the Barians and their "CXyzs".

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