This curse shrouds everything in shadow - you will not find life, light or anything natural there.
Suggestions: Allergies, blood type, physical illnesses, disabilities, etc.
Suggestions: Skin tone, skin type, skin conditions, etc
Suggestions: Race or ancestry, heigth, weigth, eye colours, eye shape, natural hair and highlight colour, natural facial and body hair colour, etc.
Any who linger are twisted by the curse; they become shadow beings - tormented, dangerous souls.
Suggestions: Hair style, hair length, facial hair, hair and highlight colour, facial and body hair colour, birthmarks, disfigurements, scars, tattoos, piercings, clothing style, frequent accessories, assistive medical devices, etc.