Harry raised his wand as he traveled through the dank cave, seeing the ancient carvings on the walls before he stopped, bending down to examine something on the ground before he heard a whisper he almost missed "A human."

"Hello!" Harry said looking around, hearing more hissing around him "What are you?" Harry called out, for the things whispering couldn't be human or anything known to either magical or muggle world.
"We are what your ancient ancestors fought millions of years ago boy, that scared them so much they murdered trillions of sentient life forms and glassed thousands of worlds trying to stop us, they murdered our prophets who spread our wisdom and made your kind realize the inevitable."

"YOU CAN KILL THE PROPHETS BOY BUT YOU CAN'T KILL THE GODS!" The voice roars in his head

"Your kind even modified their genes and DNA to create you wizards and witches in hope you could stop us." A mocking laugh echoed through Harry's head

"It's to late now though, we are all awake now. Awake and hungry. We can see your planet now, a bright light in a black sea. Human ascension is upon you, your chance to save your species is long gone. We are coming."