Sea Monster of Theseus
2017 Mega-Tins Mega Pack · #MP17-EN231 · Yu-Gi-Oh!
Yu-Gi-Oh!2017 Mega-Tins Mega PackSecret Rare1st Edition#MP17-EN231
TCGPlayer $19.69
Updated May 11, 2026, 06:01 PM
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30-Day Avg$15.89
30d Trend23.9%
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Near Mint condition over the last year
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