A Gift, an Unkindness

Dumbledore may have triumphed over him, but his mistake was in not killing him! After decades of incarceration, a decrepit and dying Grindelwald seizes his freedom and claims his vengeance in the best way he knows how: through the one Albus cares for most. "Tell me, boy, how would you like to possess the power to right the wrongs of your past...?" DARK-AU Grey/Powerful/Meta/Harry