Cursed By Blood

Voldemort created a curse as soon as the Prophecy was revealed. If he dies, the whole wizarding community will be under a plague. A plague that turns Purebloods into ravenous creatures of the night, who will hunger and feast on the blood and flesh of Mixedbloods and Muggleborns. Most especially Muggles. The day that Harry Potter killed Voldemort, was the day that the curse began.