XYZ-Dragon Cannon

Level 8 LIGHT/Machine Fusion Effect
2800 ATK / 2600 DEF

"X-Head Cannon" + "Y-Dragon Head" + "Z-Metal Tank"
Must first be Special Summoned (from your Extra Deck) by banishing the above cards you control. (You do not use "Polymerization".) Cannot be Special Summoned from the GY. You can discard 1 card, then target 1 card your opponent controls; destroy that target.

Rulings – Yugipedia

Printings:

Collectible Tins 2003: BPT-010 (Secret Rare) - 2003-09-01
Magician's Force: MFC-052 (Ultra Rare) - 2003-10-10
Dark Revelation Volume 1: DR1-EN107 (Ultra Rare) - 2005-03-19
Duelist Pack: Chazz Princeton: DP2-EN014 (Rare) - 2006-02-08
Duelist Pack: Kaiba: DPKB-EN025 (Super Rare) - 2010-04-16
Millennium Pack: MIL1-EN040 (Rare) - 2016-04-14
Structure Deck: Seto Kaiba: SDKS-EN042 (Common) - 2016-10-20
Legendary Collection Kaiba Mega Pack: LCKC-EN061 (Ultra Rare) - 2018-03-08
Speed Duel: Battle City Box: SBCB-EN084 (Common) - 2020-11-26
25th Anniversary Ultimate Kaiba Set: KC01-EN034 (Ultra Rare) - 2024-03-01
25th Anniversary Tin: Dueling Mirrors: MP24-EN011 (Quarter Century Secret Rare) - 2024-09-19

Prices:

Cardmarket: 0.17 €
TCGplayer: $ 0.15