Number C1: Numeron Chaos Gate Sunya (anime), Yu-Gi-Oh! Wiki

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Collection Pack 2020 - Yugipedia - Yu-Gi-Oh! wiki

Number 39: Utopia (anime), Yu-Gi-Oh! Wiki

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Yu-Gi-Oh! Wiki - Number C1: Numeron Chaos Gate Sunya

Chaos Necromancer (anime) - Yugipedia - Yu-Gi-Oh! wiki

Number C103: Ragnafinity (anime) - Yugipedia - Yu-Gi-Oh! wiki

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Yu-Gi-Oh! Wiki - Number C1: Numeron Chaos Gate Sunya