Elemental HERO Mariner
Warrior / Fusion / Effect
WATER / 
5"Elemental HERO Bubbleman" + "Elemental HERO Avian"
Must be Fusion Summoned. While you have any set card(s) in your Spell & Trap Zone, this card can attack your opponent directly.
1400/1000
CARD ID: 14225239
STATUS TCG: Unlimited
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| TCG Set | Symbol | Rarity | Low | Avg | Trend | |
|---|---|---|---|---|---|---|
| Dark Revelation Volume 4 | DR04-EN214 | Common | -,--€ | -,--€ | -,--€ | |
| Enemy of Justice | EOJ-EN034 | Common | -,--€ | -,--€ | -,--€ | |
| Legendary Collection 2: The Duel Academy Years Mega Pack | LCGX-EN054 | Common | -,--€ | -,--€ | -,--€ |
This card appears to be based on MARVEL's Namor the Sub-Mariner, due to its similar English name and minimal clothing. Also, Namor, despite being an aquatic hero, can fly with wings on his feet, which could be why this card has Elemental HERO Avian as a material.
This card may have also been based on DC Comics hero Aquaman
This card may have also been based on DC Comics hero Aquaman
Previously Official Rulings
If you have a face-down Field Spell Card, but no face-down cards in your Spell & Trap Card Zones, you cannot attack directly with "Elemental Hero Mariner's" effect.
If you control "Relinquished" equipped with a face-down Monster Card, that card is face-down in your Spell & Trap Card Zone, so "Elemental Hero Mariner" can attack directly.
If your only face-down card is "Rush Recklessly", you can attack directly, and then during the DAMAGE STEP, activate "Rush Recklessly" and the direct attack will continue. This is because Replays do not usually occur during the Damage Step.
If your opponent controls a monster equipped with "Ring of Magnetism", then "Elemental Hero Mariner" cannot attack directly.