| Caius the Shadow Monarch (TCG - English—Worldwide) |
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| Caius, le Monarque des Ombres (TCG - French) |
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| Caius der Schattenmonarch (TCG - German) |
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| Caius il Monarca dell'Ombra (TCG - Italian) |
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| Caius, o Monarca das Sombras (TCG - Portuguese) |
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| Caius el Monarca de las Sombras (TCG - Spanish) |
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(OCG - Japanese) |
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| 邪帝蓋烏斯 (OCG - Traditional Chinese) |
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| 사 제왕 가이우스 (OCG - Korean) |
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(Anime - Japanese) |
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| Caius the Shadow Monarch (Video Games - English—Worldwide) |
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(Video Games - Japanese) |
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(Other - Japanese) |
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 Structure Deck R: Advent of the True Monarch commercial |