Disclaimer: Harry Potter in every shape and form is the property of JK Rowling and those dudes who made the movies.
"The Power The Dark Lord Knows Not"
The only source of light in the battlefield was the light provided by the full moon and its contingent of stars. No clouds could be spotted for miles, and why would anyone want clouds to obscure what little light the combatants already had.
Up on the roof of the highest tower of Hogwarts School of Witchcraft and Wizardry stood two figures. One, whose features would be unmistakable anywhere, a face resembling that of a snake, a snake without scales, skin as pale as the moon, eyes as red as blood. The other figure, was young, with messy raven black hair, and cold Avada Kedavra emerald eyes. Below these two figures a fierce battle raged, but the victor of the battle would not be decided down there, but would be decided by the two figures facing each other atop Hogwarts. They had not moved an inch since coming face-to-face with one another on that rooftop. That is, until one of them spoke.
"Join me, there is nothing more you can do" the pale one said, "I have won, the useless rabble below us stand no chance at obtaining victory!"
While the pale one was speaking, the other much younger man drew something metallic from within his robes, and pointed it at his adversary.
"You talk too much" said the young man in a bored tone, pulled the trigger, and ended the reign of the Dark Lord Voldemort.
Once the body of the dark lord hit the grass of the lawns of Hogwarts, the battle around the castle ceased. No one moved, all just stared at the fallen form of the evilest wizard of all time, now a dead lump on the grass.
Back up on the roof the youth looked over the edge to peer at his handiwork and simply said, "The power the dark lord knows not" he paused to take a look at the desert eagle in his hand then at the corpse on the ground, then continued, "a gun, the deadliest thing on the planet at point blank range."
THE END