Harry Potter and the Prices of Power

Harry recieves special powers on his 15th b-day, and he doesn't quite understand them. Now, in addition to dealing with Umbridge, his visions, the order not telling him anything, and Voldy being back, he's got to figure out how to control his new magic. Could it be that there are others with it that can help him? Rated T for dark aspects and mild swearing. You choose the pairing.