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Sea Monster of Theseus card prices and values
There are 4 Sea Monster of Theseus cards and versions in our Yu-Gi-Oh price list. The most valuable is Sea Monster of Theseus RATE-EN081 from Raging Tempest at about $22.67 ungraded, and the highest PSA 10 value is Sea Monster of Theseus from 2017 Mega-Tins Mega Pack at about $165. 3 Sea Monster of Theseus cards make money when graded a PSA 10 at today's PSA fees. Prices updated September 23, 2026.
| Card | Raw | PSA 9 | PSA 10 |
|---|---|---|---|
 Sea Monster of Theseus RATE-EN081Raging Tempest · Unlimited | $22.67 | $57.95 | $133 |
 Sea Monster of Theseus MP17-EN2312017 Mega-Tins Mega Pack · 1st Edition | $11.87 | $81.96 | $165 |
| Sea Monster of Theseus RATE-EN081Raging Tempest · 1st Edition | $10.50 | $54.52 | $127 |
 Sea Monster of Theseus MAMO-EN071Magnificent Monsters · 1st Edition | $0.28 | $8.00 | $36.99 |
Sorted by ungraded price. Raw prices: TCGplayer market price. Graded values: PriceCharting. A dash means we do not show a graded value for that card. This is a guide, not financial advice.
Questions
Sea Monster of Theseus card questions
What is the most valuable Sea Monster of Theseus card?
Sea Monster of Theseus RATE-EN081 from Raging Tempest (Unlimited) at about $22.67 ungraded. The highest graded value is Sea Monster of Theseus from 2017 Mega-Tins Mega Pack at about $165 as a PSA 10.
How much is a Sea Monster of Theseus card worth?
It depends on the exact card and version. Sea Monster of Theseus cards in our list run from $0.28 to $22.67 ungraded. Find your card by its number in the table, then open it for the full prices.
Which Sea Monster of Theseus cards are worth grading?
At today's PSA fees the best one is Sea Monster of Theseus MP17-EN231 from 2017 Mega-Tins Mega Pack: about $11.87 raw and $165 as a PSA 10, which leaves $66.28 after fees. See all Yu-Gi-Oh cards worth grading.