"X-Head Cannon" + "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 face-down Spell/Trap your opponent controls; destroy that target.
NM-Mint 1st Edition - $0.30
Lightly Played 1st Edition - $0.30
Moderately Played 1st Edition - $0.20
Heavily Played 1st Edition - $0.20
Damaged 1st Edition - $0.20
NM-Mint 1st Edition Non English - $0.30
Lightly Played 1st Edition Non English - $0.30
Moderately Played 1st Edition Non English - $0.20
Heavily Played 1st Edition Non English - $0.20
Damaged 1st Edition Non English - $0.20