XYZ-Hyper Dragon Cannon

"X-Cross Cannon" + "Y-Yare Head" + "Z-Zillion Tank" Must first be Special Summoned (from your Extra Deck) by banishing the above cards from your field and/or GY. Once per opponent's turn (Quick Effect): You can discard 1 card, then target 1 card your opponent controls: destroy it. You can banish this card from your field or GY and reveal 1 Level 8 LIGHT Machine Fusion Monster in your Extra Deck; Special Summon up to 3 of the Fusion Materials mentioned on it from your GY and/or banishment.