Mermail King - Neptabyss
Mermail King - Neptabyss is a Link Effect Monster in the Abyss- archetype, first released in 2024 in Rage of the Abyss. It has 7 printings across 3 sets (Ultra Rare, Quarter Century Secret Rare, Secret Rare, Emblazoned Secret Rare, …). The cheapest copy is 25LP-EN013 Ultra Rare at $0.16; the most valuable is ROTA-EN046 Quarter Century Secret Rare at $12.02. In the TCG it is currently unlimited (3 copies).
Market price · TCGPlayer
Updated Oct 1, 2026
$0.16 – $12.02
7 printings priced
Type
Sea Serpent
ATK
2400
2+ monsters, including a Fish, Sea Serpent, or Aqua monster<br>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.
Appears in 3 expansions
Printings (7)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Rage of the Abyss | ROTA-EN046 | Ultra Rare | $0.24 | |
| Rage of the Abyss | ROTA-EN046 | Quarter Century Secret Rare | $12.02 | |
| Limited Pack World Championship 2025 | 25LP-EN013 | Ultra Rare | $0.16 | |
| Limited Pack World Championship 2025 | 25LP-EN013 | Secret Rare | $0.35 | |
| Limited Pack World Championship 2025 | 25LP-EN013 | Emblazoned Secret Rare | $1.45 | |
| Limited Pack World Championship 2025 | 25LP-EN013 | Emblazoned Ultra Rare | $0.33 | |
| 2025 Mega-Pack | MP25-EN415 | Common | $0.25 |
Mermail King - Neptabyss: FAQ
How much is Mermail King - Neptabyss worth?+
Mermail King - Neptabyss currently sells for $0.16 – $12.02 on TCGPlayer, from $0.16 for 25LP-EN013 up to $12.02 for ROTA-EN046. The exact value depends on the printing, rarity, edition and condition — scan the card with YuScan to see the price of your copy.
Which sets was Mermail King - Neptabyss printed in?+
Mermail King - Neptabyss appears in 3 sets: Rage of the Abyss, Limited Pack World Championship 2025, 2025 Mega-Pack.
Is Mermail King - Neptabyss legal in tournaments?+
On the current TCG Forbidden & Limited List, Mermail King - Neptabyss is unlimited (3 copies).
What is the passcode of Mermail King - Neptabyss?+
The 8-digit passcode printed on Mermail King - Neptabyss is 69385019.
Abyss-
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