The shop that garnered my attention, and apparently the family as well, was Borgin and Burkes. Just by a quick glance, I was able to tell that most of the items in the shop were dark or dark leaning. Many were along the lines to cause excruciating pain that would cause your skin to rot off and slowly eat away at the body. Eventually killing you when your heart failed when the curse hit affected the blood. Quite gruesome. 