Dusk-mane Necrozma or Dawn-wings Necrozma and 2 Dragon MonstersThis card can only be fusion summond by the effects of Ultra Burst, and cannot be summoned by any other means.Once per turn, activate one of these effects:● Add one "Necrozma" monster from your deck to you hand.● Add one "Light That Burns The Sky" from your deck to your Hand.When this card is sent from the field to the GY, take 1000 damage.
Once per turn, you can Fusion Summon "Ultra Necrozma, Ultra Beast of Light" using the listed Fusion Materials from the Hand, Field, and GY.
Light That Burns The Sky:
Activate this card while you control "Ultra Necrozma, Ultra Beast of Light". Banish all cards on the field excluding "Ultra Necrozma, Ultra Beast of Light" you control face-down. During the turn you activated this card you cannot conduct your Battle Phase this turn. You can only activate "Light That Burns The Sky" once per duel.