A dementor flared up in Draco's face, the black hood empty and dark and utter blackness. There was a low hissing sound, angry and excited. But Remus wouldn't allow Draco to be hurt and coughed violent before he summoned up his one beautiful happy memory that no darkness could touch - the feeling of Teddy asleep in his arms when he was born, his hair dark and soon to be ginger.

"Expecto Patronum!" He gasped out, and though it was weak at first, his wolf returned, running after at his intended target, the one about to touch Draco.