6eeba363_onsters___Yu_Gi_Oh__Card_Guide__Card_Text
[Card Name] Superdreadnought Rail Cannon Gustav Max [Type] Xyz/Effect Monster [Attribute] EARTH [Sub Type] Machine [ATK] 3000 [DEF] 3000 [Card Text] 
2 Level 10 monsters Once per turn: You can detach 1 Xyz Material from this card; inflict 2000 damage to your opponent.
Yu-Gi-Oh! Level 10 Monsters - Yu-Gi-Oh! Card Guide