⇒ Put the top four cards of your deck into your graveyard. Then, you may put a resonator from your graveyard into the field. If you do, it gains darkness in addition to its other attributes and Vampire in addition to its other races.
God's Art "Blood Revolution"
: For each Vampire you control and starting from the one with the highest ATK to the one with the lowest ATK, target a resonator your opponent controls. Vampires you control gain [+400/+400] until end of turn. Then, each of them deals damage equal to its ATK to its chosen target. (You may choose the same target multiple times with different Vampires.)