Elemental HERO Mariner

Level 5 WATER/Warrior Fusion Effect
1400 ATK / 1000 DEF

"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 – Yugipedia

Printings:

Enemy of Justice: EOJ-EN034 (Common) - 2006-05-17
Dark Revelation Volume 4: DR04-EN214 (Common) - 2007-11-14
Legendary Collection 2: The Duel Academy Years Mega Pack: LCGX-EN054 (Common) - 2011-10-04
Speed Duel GX: Midterm Paradox: SGX2-ENA24 (Common) - 2022-10-06

Prices:

Cardmarket: 0.22 €
TCGplayer: $ 0.23