Rokket Caliber

You can Special Summon this card (from your hand) to your zone a DARK Link Monster points to. You can only Special Summon "Rokket Caliber" once per turn this way. You can Tribute this card; Special Summon 1 DARK Dragon or Machine monster from your hand, except "Rokket Caliber". You can only use this effect of "Rokket Caliber" once per turn.