Emeralds and Ashes

The Battle of the Department of Mysteries had far worse consequences than Harry had ever expected, leaving him a completely changed young man. An ambitious plan is proposed by a man emerging out of nowhere, throwing his life off its preordained trajectory. Harry thought he would be the one to end Voldemort, but he could've never imagined he would be traveling to the 1970s to stop him. Post-OOTP Time Travel. Strong!HarryxNarcissaxBellatrix.