Spelled Voiceless

That fateful night in the astronomy tower at the end of sixth year, Harry is hit with an unknown spell, rendering him mute. Dealing with whole new problems and having discovered Voldemort's secret to immortality that very night, Harry must now endeavor to defeat Voldemort. Voiceless. Canon up to end of HBP. AU DH. Eventual Powerful!Harry. Hogwarts Deathly Hallows.