To Rekindle the Flame

The way to Valinor is lost. Men and Dwarves and Elves despair in their decaying world as an old evil arises again. All of Arda stands upon the edge of a knife. And then there's Lily, a source of magic unlike any before seen in Middle-earth. And Sauron knows it. (fem!Harry, set 200 years before the events of LOTR, canon divergence, little to no romance, powerful HP magic)