Fafnir his foster-son Sigurd to kill the dragon. Regin instructed Sigurd to dig a pit in which he could lie in wait under the trail Fáfnir used to get to a stream and there plunge his sword, Gram, into Fafnir's heart as he crawls over the pit to the water. Regin then ran away in fear, leaving Sigurd to the task. As Sigurd dug, Odin appeared in the form of an old man with a long beard, advising the warrior to dig more trenches for the blood of Fafnir to run into, presumably so that Sigurd does not drown in the
Idis (Germanic) was also extremely varied – fertility goddess, personal guardians, but also warrior-goddesses – the belief in the "dísir", like the belief in the valkyries, norns, and matrons, may be considered to be different manifestations of a belief in a number of female (half-?) goddesses." Jacob Grimm proposes a potential connection to the name of the Norse goddess Iðunn and the idisi. Grimm states that "with the original form "idis" the goddess Idunn may possibly be connected." Idis (Germanic) In Germanic mythology, an idis (Old Saxon, plural idisi) is a divine female being. "Idis" is cognate to Old High German itis