Harry never fully understood time-travel, he thought it was just as it sounded. Travelling between times. But when he travelled back to save her, he finds out he didn't just time travel. He did something completely different. (Being Rewritten, rewritten chapter isn't out yet.)

Unable to manage even the simplest spells, an outcast Harry must overcome the unexpected twists of a detention gone wrong, and the worst massacre in Wizarding Britain's history. Eventual Powerful!Harry, HP/DG