Most often, kobolds remain completely invisible. Although King Goldemar (or Goldmar), a famous kobold from Castle Hardenstein, had hands "thin like those of a frog, cold and soft to the feel", he never showed himself. The master of Hundermühlen Castle, where Heinzelmann lived, convinced the kobold to let him touch him one night. The kobold's fingers were childlike, and his face was like a skull, without body heat. One legend tells of a female servant taking a fancy to her house's kobold and asking to see him. The kobold refuses, claiming that to look upon him would be terrifying. Undeterred, the maid insists, and the kobold tells her to meet him later—and to bring along a pail of cold water. The kobold waits for the maid, nude and with a butcher knife in his back. The maid faints at the sight, and the kobold wakes her with the cold water. In one variant, the maid sees a dead baby floating in a cask full of blood; years before, the woman had born a bastard child, killed it, and hidden it in such a cask. Legends tell of those who try to trick a kobold into showing itself being punished for the misdeed. For example, Heinzelmann tricked a nobleman into thinking that the kobold was hiding in a jug. When the nobleman covered the jug's mouth to trap the creature, the kobold chided him: