Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142
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Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 collector guide
About Mobius the Frost Monarch
Mobius the Frost Monarch is an Effect Monster, printed as RA03-EN142 in Quarter Century Bonanza (2024) as a Platinum Secret Rare. It is a Level 6 WATER Aqua monster with 2,400 ATK and 1,000 DEF. At its Level it needs one Tribute to Normal Summon. Quarter Century Bonanza, released in late 2024, mixes classic cards from the original series with modern staples, each in several rarities including Quarter Century Secret Rare and Platinum Secret Rare. Ungraded, this printing ranks 452nd of the 968 Quarter Century Bonanza cards we track. The top card is Blue-Eyes White Dragon at €192.99.
Character and collecting appeal
Aqua monsters often work with water Field Spells such as Umi. In play, it is a card for destroying cards.
Version and identification
Check the code printed below the artwork on the right: it should read RA03-EN142. RA03-EN142 is the English printing. Other languages use their own letters in place of EN, such as DE or FR, and are priced separately. It is the Platinum Secret Rare version. Platinum Secret Rares are a newer Secret Rare variant with a platinum-coloured finish. Quarter Century Bonanza has one other printing of Mobius the Frost Monarch: RA03-EN142 Quarter Century Secret Rare (€13.57). Each has its own price, so match the code, edition and rarity exactly.
Price history
Today an ungraded copy of this printing sells for about €2.23, a PSA 9 for €11.08 and a PSA 10 for €39.68. Our monthly prices for it go back to November 2024. Over the last 12 months ungraded copies are down 9%, and flat in the last month. Its highest monthly ungraded value was €3.34 in August 2026, 33% above today. PSA 10 copies have moved down 6% over the same 12 months.
Grading and population
A PSA 10 sells for 17.8× the ungraded price and 3.6× a PSA 9. That gap is small, so grading fees may outweigh the gain unless the card is for your own collection. Even pack-fresh modern cards can have surface scratches or curling foil, so a 10 is never guaranteed.
Investment potential
In its favour: an active market (25 recent completed sales), so it is easy to sell. Against it: large modern print runs, which tend to cap prices unless a card becomes iconic. Past prices do not guarantee future ones. This is not financial advice.
Before you buy
Expect to pay around €2.23 for a clean ungraded copy; played copies sell for less, and a PSA 9 costs about €11.08. Ask the seller to show the code RA03-EN142 and the Platinum Secret Rare finish clearly in the photos, as listing titles often mix up printings. Modern foils can be scratched or curled straight from the pack, so check the surface under a light if you plan to grade.
Card details and image from YGOPRODeck. Yu-Gi-Oh! is a trademark of Konami; Search Cards is not affiliated with Konami.
Most popular Quarter Century Bonanza cards
How much is Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) worth?
As of , an ungraded copy of Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 from Quarter Century Bonanza sells for about €2.23 (about $2.50), a PSA 9 for about €11.08 (about $12.43) and a PSA 10 for about €39.68 (about $44.50). These values are based on 25 recent completed sales, the latest on 5 Sept 2026. Ungraded values are down 9% over the last 12 months and PSA 10 values are down 6%. A PSA 10 sells for 17.8× the ungraded price.
Prices are market values from completed sales, shown in euros (converted from US dollars) and updated every few hours.
Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 FAQ
How much is Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) worth?
Ungraded, Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) is worth about €2.23 (about $2.50). A PSA 9 sells for about €11.08 (about $12.43). A PSA 10 sells for about €39.68 (about $44.50). Based on recent completed sales as of 23 Oct 2026.
What is a PSA 10 Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 worth?
A PSA 10 Gem Mint Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) recently sold for about €39.68 (about $44.50), down 6% over the last 12 months. Its highest monthly PSA 10 value was €46.31 in August 2026.
Is Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) worth grading?
A PSA 10 sells for about 17.8× the ungraded price (€39.68 vs €2.23). The gap is small, so grading fees may outweigh the gain for most copies.
Is Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) going up in value?
Ungraded Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 values are down 9% over the last 12 months and unchanged over the last month. The highest monthly ungraded value was €3.34 in August 2026.
When was Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 (Quarter Century Bonanza) released?
Mobius the Frost Monarch [Platinum Secret Rare] #RA03-EN142 was released on November 7, 2024 as part of Quarter Century Bonanza.