XYZ-Dragon Cannon (DP2-EN014) - Duelist Pack 2: Chazz Princeton Unlimited

X-Head Cannon + Y-Dragon Head + Z-Metal Tank
This card cannot be Special Summoned except by removing from play the above cards on your side of the field; then you can Special Summon this card from your Fusion Deck (You do not use Polymerization). Discard 1 card from your hand to destroy 1 card on your opponent''s side of the field.