Of all the trees the most wonderful was a great ash tree, sometimes called the "world tree." Its branches covered the earth and reached beyond the sky till they almost touched the stars. Its roots ran in three directions, to heaven, to the frost giants' home and to the under-world, beneath the earth.
Near the roots in the dark under-world sat the Norns, or fates. Each held a bowl with which she dipped water out of a sacred spring and poured it upon the roots of the ash tree. This was the reason why this wonderful tree was always growing, and why it grew as high as the sky.
When Woden killed Ymir he tried to kill all Ymir's children too; but one escaped, and ever after he and his family, the frost giants, tried to do mischief, and fought against gods and men.
According to the belief of the Teutons these wicked giants will some day destroy the beautiful world. Even the gods themselves will be killed in a dreadful battle with them. First of all will come three terrible winters without any spring or summer. The sun and moon will cease to shine and the bright stars will fall from the sky. The earth will be shaken as when there is a great earthquake; the waves of the sea will roar and the highest mountains will totter and fall. The trees will be torn up by the roots, and even the "world tree" will tremble from its roots to its topmost boughs. At last the quivering earth will sink beneath the waters of the sea.
Then Loki, the spirit of evil, will break loose from the fetters with which the gods have bound him. The frost giants will join him. They will try to make a secret attack on the gods. But Heimdall, the sentry of heaven, will be on guard at the end of the rainbow-bridge. He needs no more sleep than a bird and can see for a hundred miles either by day or night. He only can sound the horn whose blast can be heard through heaven and earth and the under-world. Loki and his army will be seen by him. His loud alarm will sound and bring the gods together. They will rush to meet the giants. Woden will wield his spear—Tiew his glittering sword—Thor his terrible hammer. These will all be in vain. The gods must die. But so must the giants and Loki.
And then a new earth will rise from the sea. The leaves of its forests will never fall; its fields will yield harvests unsown. And in a hall far brighter than Woden's Valhalla the brave and good will be gathered forever.
THE NIBELUNGS
I
The time came when the people of Western Europe learned to believe in one God and were converted to Christianity, but the old stories about the gods and Valkyries and giants and heroes, who were half gods and half men, were not forgotten.
These stories were repeated from father to son for generations, and in the twelfth century a poet, whose name we do not know, wrote them in verse. He called his poem the Nï'bel-ung'en-lied (song of the Nibelungs). It is the great national poem of the Germans. The legends told in it are the basis of Wagner's operas.