Trident Dragion

Level 10 FIRE/Dragon Synchro Effect
3000 ATK / 2800 DEF

1 Dragon-Type Tuner + 1 or more non-Tuner Dragon-Type monsters
Must be Synchro Summoned, and cannot be Special Summoned by other ways. When this card is Synchro Summoned: You can target up to 2 other cards you control; destroy those targets, and if you do, for each destroyed card, this card gains 1 additional attack during each Battle Phase this turn.

Rulings – Yugipedia

Printings:

Raging Battle: RGBT-EN043 (Ultimate Rare) - 2009-05-12
Raging Battle: RGBT-EN043 (Ultra Rare) - 2009-05-12
Legendary Collection 5D's Mega Pack: LC5D-EN237 (Secret Rare) - 2014-10-23
25th Anniversary Tin: Dueling Mirrors: MP24-EN147 (Prismatic Secret Rare) - 2024-09-19

Prices:

Cardmarket: 9.62 €
TCGplayer: $ 9.86