Darkstar Sign

You can only Fusion Summon once per Duel. [REQUIREMENT] Twice per Duel. [EFFECT] Reveal 1 DARK Attribute Fusion Monster in your Extra Deck, and the original ATK of 1 face-up monster on your field whose name is specifically listed as material on that Fusion Monster becomes 1600 until the end of the turn. Then, you can add 1 "Fusion" from outside of your Deck to your hand (once per Duel).