Out of Walburga's Hands

Alphard, though Slytherin, has tried to stay away from his beloved sister and her family. At her invitation, however, he has been summoned to guide young Sirius in making more suitable acquaintances. Will Alphard lead his nephew to make the right choices, or will it be a matter of protecting him? Written for the Diagon Alley II forum's NYE Battle Comp.