Siegfried, a hero of various Scandinavian and Teutonic legends, and especially of the "Nibelungen Lied" (q. v.), was rendered invulnerable by bathing in the blood of a dragon which he had slain, except at a spot on his body which had been covered by a falling leaf; he wore a cloak which rendered him invisible, and wielded a miraculous sword named Balmung (q. v.).