Darkness Destroyer

Level 7 DARK/Fiend Effect
2300 ATK / 1800 DEF

Cannot be Special Summoned. This card can attack twice during each Battle Phase. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent.

Rulings – Yugipedia

Printings:

Yu-Gi-Oh! GX Tag Force 3 promotional cards: GX06-EN003 (Super Rare) - 2008-11-28
Legendary Collection 2: The Duel Academy Years Mega Pack: LCGX-EN204 (Secret Rare) - 2011-10-04

Prices:

Cardmarket: 0.72 €
TCGplayer: $ 0.96