“So it all comes down to this, doesn’t it?” whispered Harry.
“Does the wand in your hand know its last master was Disarmed? Because if it does . . . I am the true master of the Elder Wand.” A red-gold glow burst suddenly across the enchanted sky above them as an edge of dazzling sun appeared over the sill of the nearest window. The light hit both of their faces at the same time, so that Voldemort’s was suddenly a flaming blur. Harry heard the high voice shriek as he too yelled his best hope to the heavens, pointing Draco’s wand:
“Avada Kedavra!”
"No u!"
There was no meeting of spells as Harry had casted the most powerful spell in the existence of wizard kind, the demise of dark Lord was inevitable.