Tengu format ruling
Elemental HERO Mariner
Card effect (current official text)"Elemental HERO Bubbleman" + "Elemental HERO Avian"
Must be Fusion Summoned and cannot be Special Summoned by other ways. While you have any face-down card(s) in your Spell & Trap Card Zones, this card can attack your opponent directly.
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.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.