YZ-Tank Dragon

Level 6 LIGHT/Machine Fusion Effect
2100 ATK / 2200 DEF

"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 Graveyard. You can discard 1 card, then target 1 face-down monster your opponent controls; destroy that target.

Rulings – Yugipedia

Printings:

Magician's Force: MFC-054 (Super Rare) - 2003-10-10
Dark Revelation Volume 1: DR1-EN109 (Rare) - 2005-03-19
Duelist Pack: Rivals of the Pharaoh: DPRP-EN027 (Rare) - 2016-09-15
Speed Duel: Battle City Box: SBCB-EN086 (Common) - 2020-11-26

Prices:

Cardmarket: 0.27 €
TCGplayer: $ 0.76