Number C10X

"Number C10X" (１０Ｘ Kaosu Nanbāzu Hyaku), short for "Chaos Over-Hundred Number", is a sub-archetype to both the "Number 10X" and "Number C" archetype, used by the Emperors of Barian World. Each Chaos version of them seems to have a red aura inside of their body. In anime, most of them were first summoned by Ranking-Up the corresponding "Number 10X" using "Rank-Up-Magic Barian's Force". After Nasch and Merag got their memories back, the Barian Emperors were supplied by "Rank-Up-Magic The Seventh One", allowing a very easy summon (from Graveyard or Extra Deck). However, the first support card was "Chaos Mad Feast". The usual tactic of "Number C10X" is to negate their opponent's effects and/or deal a lot of damage (helpful in the anime due to the effects of Yuma's "Number 39: Utopia" and Kite's "Galaxy-Eyes Photon Dragon").

This archetype is somewhat unusual in that the exact string given in the effect of "Chaos Mad Feast" doesn't actually appear in the names of any members; instead it has the clause "X is any number from 1 to 7" (「Ｘは１～７の任意の数値」).