4fd932d3_onsters___Yu_Gi_Oh__Card_Guide__Card_Text
[Card Name] XYZ-Dragon Cannon [Type] Fusion/Effect Monster [Attribute] LIGHT [Sub Type] Machine [ATK] 2800 [DEF] 2600 [Card Text] 
X-Head Cannon + "Y-Dragon Head" + "Z-Metal Tank" This card can only be Special Summoned from your Extra Deck by removing from play the above cards you control. (You do not use "Polymerization".) This card cannot be Special Summoned from the Graveyard. You can discard 1 card to destroy 1 card your opponent controls.
Yu-Gi-Oh! Level 8 Monsters - Yu-Gi-Oh! Card Guide
Card Text