Cannot be Normal Summoned/Set. Must be Special Summoned with "Assault Mode Activate" (or by its own effect). When a card or effect is activated (Quick Effect): You can Tribute this card; negate the activation, and if you do, destroy it. Once per turn, during the End Phase, if this effect was activated this turn (and was not negated): You can Special Summon this card from your GY. When this card on the field is destroyed: You can target 1 "Stardust Dragon" in your GY; Special Summon it.