Mermail King - Neptabyss (Quarter Century Secret Rare)
Yu-Gi-Oh! · Rage of the Abyss · Quarter Century Secret Rare · ROTA-EN046
Released 2024-10-11
$11.42
30-day forecast: $11.42
Live Yu-Gi-Oh! price tracking, buyout detection, and price predictions for Mermail King - Neptabyss (Quarter Century Secret Rare) on TCG Collector Tools.
Card Text
Link Monster · Sea Serpent · WATER · ATK 2300 · Link-3 · Abyss- archetype
2+ monsters, including a Fish, Sea Serpent, or Aqua monster Your opponent cannot target WATER monsters this card points to with card effects. You can only use each of the following effects of "Mermail King - Neptabyss" once per turn. If a WATER monster(s) is sent to the GY to activate a card or effect (except during the Damage Step): You can take 1 "Abyss-" Equip Spell from your Deck or GY and either add it to your hand or equip it to this card. If this card in its owner's possession is destroyed by an opponent's card: You can add 1 "Atlantean" or "Mermail" monster from your Deck to your hand.
Prices Across Marketplaces
Price Forecast
| Horizon | Forecast | vs Today |
|---|---|---|
| 7 days (stable) | $11.42 | +0.0% |
| 30 days (stable) | $11.42 | +0.0% |
| 90 days | $11.92 | +4.4% |
| 180 days | $11.92 | +4.4% |
| 1 year | $11.92 | +4.4% |
Confidence 86% · Calibrated 30-day range $10.60–$12.24 · mature card · veryLow volatility
Our Forecast Track Record
What we predicted for this card, and what actually happened. We publish misses as well as hits. Anchored 2026-06-21 · at $12.80 · 39 days ago.
| Horizon | We predicted | Actual | Error |
|---|---|---|---|
| Day 7 | $12.60 | $12.49 | -0.9% |
| Day 30 | $12.53 | $11.42 | -8.9% |
Signal Analysis
Mixed signals. Monitor for clearer direction.
Printings (5)
| Set | Code | Rarity | Price |
|---|---|---|---|
| 2025 Mega-Pack Tin | MP25-EN415 | Common | — |
| Limited Pack World Championship 2025 | 25LP-EN013 | Secret Rare | — |
| Limited Pack World Championship 2025 | 25LP-EN013 | Ultra Rare | — |
| Rage of the Abyss | ROTA-EN046 | Quarter Century Secret Rare | — |
| Rage of the Abyss | ROTA-EN046 | Ultra Rare | — |
Recent Price History
Frequently Asked Questions
How much is Mermail King - Neptabyss (Quarter Century Secret Rare) worth?
Mermail King - Neptabyss (Quarter Century Secret Rare) is currently $11.42 on TCGplayer for the Rage of the Abyss printing. Prices update daily from live marketplace data.
Is Mermail King - Neptabyss (Quarter Century Secret Rare) going up or down in price?
Our 30-day forecast for Mermail King - Neptabyss (Quarter Century Secret Rare) is $11.42, with a stable trend at 86% confidence.
How many times has Mermail King - Neptabyss (Quarter Century Secret Rare) been printed?
Mermail King - Neptabyss (Quarter Century Secret Rare) has 5 known printings, including 2025 Mega-Pack Tin, Limited Pack World Championship 2025, Limited Pack World Championship 2025.