harry falls for his horcrux trope with a twist

When Harry Potter cast his first Cruciatus Curse, he was successful. In doing so, he awoke the darkness in his head. It whispers, and it's never wrong. The darkness is hungry, and won’t be denied. ‘To go in the dark with a light is to know the light. To know the dark, go dark, go without sight and find that the dark, too, blooms and sings.’