At those words Regin opened his great jaws, and showed his terrible fangs. Yet still the boy Prince mocked at the hideous dragon.
And now Regin in his fury crept closer and closer to the lad, swinging his great tail, until he well-nigh swept Siegfried from his feet.
Swiftly then the Prince drew his sword, well tempered as he knew, for had not he himself wrought it in the forge of Mimer the blacksmith? Swiftly he drew his sword, and with one bound he sprang upon the dragon's back, and as he reared himself, down came the hero's shining sword and pierced into the very heart of the monster. Thus as Siegfried leaped nimbly to the ground, the dragon fell back dead. Regin was no longer to be feared.
Then Siegfried did a curious thing. He had heard the little Nibelung men who came to the smithy to talk with Mimer, he had heard them say that whoever should bathe in the blood of Regin the dragon would henceforth be safe from every foe. For his skin would grow so tough and horny that it would be to him as an armour through which no sword or spear could ever pierce.
Thinking of the little Nibelungs' harsh voices and wrinkled little faces, as they had sat talking thus around Mimer's glowing forge, Siegfried now flung aside his deerskin dress and bathed himself from top to toe in the dragon's blood.
But as he bathed, a leaf from off a linden tree was blown upon his shoulders, and on the spot where it rested Siegfried's skin was still soft and tender as when he was a little child. It was only a tiny spot which was covered by the linden leaf, but should a spear thrust, or an arrow pierce that tiny spot, Siegfried would be wounded as easily as any other man.
The dragon was dead, the bath was over, and clad once more in his deerskin, Siegfried set out for the smithy. He brought no charcoal for the forge; all that he carried with him was a heart afire with anger, a sword quivering to take the life of the Nibelung, Mimer.
For now Siegfried knew that the dwarf had wished to send him forth to death, when he bade him go seek charcoal in the depths of the forest.
Into the dusky glow of the smithy plunged the hero, and swiftly he slew the traitor Mimer. Then gaily, for he had but slain evil ones of whom the world was well rid, then gaily Siegfried fared through the forest in quest of adventure.