But though the host of heroes grew to a goodly number, the terror of _Alberich's_ curse still haunted the chief of gods. He might have freed himself from it had he returned the ring and helmet made of Rhinegold to the _Rhinedaughters_, from whom _Alberich_ filched it; but in his desire to persuade the giants to relinquish _Freia_, whom he had promised to them as a reward for building Walhalla, he, having wrested the ring from _Alberich_, gave it to the giants instead of returning it to the _Rhinedaughters_. He saw the giants contending for the possession of the ring and saw _Fasolt_ slain--the first victim of _Alberich's_ curse. He knows that the giant _Fafner_, having assumed the shape of a huge serpent, now guards the Nibelung treasure, which includes the ring and the Tarnhelmet, in a cave in the heart of a dense forest. How shall the Rhinegold be restored to the _Rhinedaughters_?
_Wotan_ hopes that this may be consummated by a human hero who, free from the lust for power which obtains among the gods, shall, with a sword of _Wotan's_ own forging, slay _Fafner_, gain possession of the Rhinegold and restore it to its rightful owners, thus righting _Wotan's_ guilty act and freeing the gods from the curse. To accomplish this _Wotan_, in human guise as _Wälse_, begets, in wedlock with a human, the twins _Siegmund_ and _Sieglinde_. How the curse of _Alberich_ is visited upon these is related in "The Valkyr."
The dramatis personæ in "The Valkyr" are _Brünnhilde_, the valkyr, and her eight sister valkyrs; _Fricka_, _Sieglinde_, _Siegmund_, _Hunding_ (the husband of _Sieglinde_), and _Wotan_. The action begins after the forced marriage of _Sieglinde_ to _Hunding_. The Wälsungs are in ignorance of the divinity of their father. They know him only as _Wälse_.
Act I. In the introduction to "The Rhinegold," we saw the Rhine flowing peacefully toward the sea and the innocent gambols of the _Rhinedaughters_. But "The Valkyr" opens in storm and stress. The peace and happiness of the first scene of the cycle seem to have vanished from the earth with _Alberich's_ abjuration of love, his theft of the gold, and _Wotan's_ equally treacherous acts.
This "Valkyr" Vorspiel is a masterly representation in tone of a storm gathering for its last infuriated onslaught. The elements are unleashed. The wind sweeps through the forest. Lightning flashes in jagged streaks across the black heavens. There is a crash of thunder and the storm has spent its force.