Activate 1 of these effects (but you can only use each effect of "Double Interlock" once per turn);
• Fusion Summon 1 Fusion Monster from your Extra Deck, by banishing its materials from your GY, including a "Rokket" monster.
• Ritual Summon 1 Ritual Monster from your hand, by banishing monsters from your GY whose total Levels equal or exceed its Level, including a "Rokket" monster.