Big Bang Shot

Equip Spell Card

The equipped monster gains 400 ATK. If the equipped monster attacks a Defense Position monster, inflict piercing battle damage to your opponent. When this card leaves the field, banish the equipped monster.

Rulings – Yugipedia

Printings:

Magician's Force: MFC-086 (Rare) - 2003-10-10
Dark Revelation Volume 1: DR1-EN141 (Rare) - 2005-03-19
Champion Pack: Game Two: CP02-EN019 (Common) - 2007-02-06
Rise of the Dragon Lords Structure Deck: SDRL-EN027 (Common) - 2007-10-24
The Dark Emperor Structure Deck: SDDE-EN024 (Common) - 2008-04-02
Warriors' Strike Structure Deck: SDWS-EN026 (Common) - 2009-10-23
Battle Pack: Epic Dawn: BP01-EN075 (Common) - 2012-05-24
Battle Pack: Epic Dawn: BP01-EN075 (Starfoil Rare) - 2012-05-24
Battle Pack 2: War of the Giants: BP02-EN141 (Common) - 2013-06-28
Battle Pack 2: War of the Giants: BP02-EN141 (Mosaic Rare) - 2013-06-28

Prices:

Cardmarket: 0.11 €
TCGplayer: $ 0.24