The witchers' medallion is a silver symbol of the witchers' profession. Each one is shaped to represent the school a witcher comes from. It is sensitive to magic, vibrating and tugging on its chain when spells are being cast or magical beings, like genies, are present. This magic medallion is given to every young witcher candidate who has passed the Trial of the Grasses. The origin of the first medallions is unknown, though it is assumed they were made in the magic forge at Kaer Morhen. The medallions vibrate in response to magic in all its forms, including curses, charms, and spells. They also warn of lurking monsters born of magic or magic experimentation. However, witcher medallions are not foolproof, certain monsters such as dopplers and higher vampires remain undetected whenever in ra