Cantus Dimindium Argenteum

When Harry was snatched and being hold in a cell by the death eaters, Snape is ordered to rescue him by any means. As they recover, matters of conflict, family, duties and guilt surfaces. The boy who lived, chained by a prophecy. And the spy, whose life soon to be owned thrice. Despite their grievances, their similarities create an unlikely bond. (Cross-posted on AO3 with illust.)