Infinitrack Mountain Smasher

2 Level 7 monsters When this card destroys an opponent's monster by battle: You can attach that monster to this card as material. You can only use each of the following effects of "Infinitrack Mountain Smasher" once per turn. • You can detach 1 material from this card; it gains 1000 ATK. • If this card is in your GY: You can Tribute 1 Machine Link Monster; Special Summon this card in Defense Position.