"[i]Attack it now while you still can![/i]" Saisei suggested, "[i]It's charging a move called Light That Burns the Sky![/i]"
"Understood, Saisei," Shiranui acknowledged, "Saisei, Mega Evolve and use Shadow Ball; Lunala, use Black Hole Eclipse!"  Shiranui equipped his Darkium Z onto his Z-Power Ring, activated his keystone and performed the dance Nanu taught him to activate Black Hole Eclipse.  Saisei became a Mega Mewtwo Y and fired a powerful Shadow Ball and the Lunala that brought Shiranui to this world conjured a black hole above Ultra Necrozma.