Number C105: Battlin' Boxer Comet Cestus

Level 5 FIRE/Warrior Xyz Effect
2800 ATK / 2000 DEF

4 Level 5 monsters
When this card destroys an opponent's monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to half the destroyed monster's original ATK. If this card has "Number 105: Battlin' Boxer Star Cestus" as an Xyz Material, it gains this effect.
● Once per turn: You can detach 1 Xyz Material from this card, then target 1 monster your opponent controls; destroy it, and if you do, inflict damage to your opponent equal to the destroyed monster's ATK on the field.

Rulings – Yugipedia

Printings:

Lord of the Tachyon Galaxy: LTGY-EN052 (Ultimate Rare) - 2013-05-17
Lord of the Tachyon Galaxy: LTGY-EN052 (Ultra Rare) - 2013-05-17
2014 Mega-Tin Mega Pack: MP14-EN029 (Ultra Rare) - 2014-08-28
Legendary Duelists: Soulburning Volcano: LD10-EN043 (Common) - 2023-08-10

Prices:

Cardmarket: 0.13 €
TCGplayer: $ 0.12