D.D. Jet Iron (HA07-EN035) [Hidden Arsenal 7: Knight of Stars]

Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by sending 1 "D.D. Esper Star Sparrow", "Beast-Warrior Puma", "Phoenix Beast Gairuda", and "Ironhammer the Giant" from your hand and/or face-up from your side of the field to the Graveyard. You can Tribute this card to target 1 "D.D. Esper Star Sparrow", "Beast-Warrior Puma", "Phoenix Beast Gairuda" and "Ironhammer the Giant" in your Graveyard; Special Summon those targets.