The Veiled Vestiges

AU. A slight deviation in the plans. A ripple broadening to destroy his whole world. A secret out in the open and fire rained from the sky. A world to save, an oath to keep. He won't let them down. What would Harry do to save them all? Why do what he always does, of course. Defy the odds, those pesky old gods, their rules and get back HOME. Time-Travel! Believably-Powerful Harry! Smart Harry! Politically-Perspicacious Harry! And some more twists and turns along the way.