Tangled old hair tied together by a silk crimson ribbon. Hair is very popular in rituals and witchcraft, it's a common believe that witches stored their power in their hair. If by any means they were cut and separated from the original owner they will still retain some of their magical properties and can therefore be used as a catalyst to cast hexes and spells. They will not be as powerful as used by the witch that they were stolen from, but still, can do irreparable damage if the new owner connects with the power within them.
Used 3DSMax and Zbrush for sculpting and detail. Textured in Substance Painter in 2K resolution. I'm aware that the background doesn't fade in properly, it's an unfortunate artifact of saving the render directly from Substance Painter. I will eventually correct it in Photoshop.