Junk Barrage

Equip Spell

When the equipped monster destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to half the destroyed monster's ATK in the Graveyard.

Rulings – Yugipedia

Printings:

The Duelist Genesis: TDGS-EN047 (Common) - 2008-09-02
Duelist Pack: Yusei: DP08-EN019 (Common) - 2009-02-24
Legendary Collection 5D's Mega Pack: LC5D-EN044 (Common) - 2014-10-23

Prices:

Cardmarket: 0.11 €
TCGplayer: $ 0.19