Now Odin knew that if a great wall could be built around it the Gods would not have to spend all their time defending their City, Asgard, from the Giants, and he knew that if Asgard were protected, he himself could go amongst men and teach them and help them. He thought that no payment the Stranger could ask would be too much for the building of that wall.
That day the Stranger came to the Council of the Gods, and he swore that in a year he would have the great wall built. Then Odin made oath that the Gods would give him what he asked in payment if the wall was finished to the last stone in a year from that day.
The Stranger went away and came back on the morrow. It was the first day of Summer when he started work. He brought no one to help him except a great horse.
Now the Gods thought that this horse would do no more than drag blocks of stone for the building of the wall. But the horse did more than this. He set the stones in their places and mortared them together. And day and night and by light and dark the horse worked, and soon a great wall was rising round the palaces that the Gods themselves were building.
"What reward will the Stranger ask for the work he is doing for us?" the Gods asked one another.
Odin went to the Stranger. "We marvel at the work you and your horse are doing for us," he said. "No one can doubt that the great wall of Asgard will be built up by the first day of Summer. What reward do you claim? We would have it ready for you."
The Stranger turned from the work he was doing, leaving the great horse to pile up the blocks of stone. "O Father of the Gods," he said, "O Odin, the reward I shall ask for my work is the Sun and the Moon, and Freya, who watches over the flowers and grasses, for my wife."
Now when Odin heard this he was terribly angered, for the price the Stranger asked for his work was beyond all prices. He went amongst the other Gods who were then building their shining palaces within the great wall and he told them what reward the Stranger had asked. The Gods said, "Without the Sun and the Moon the world will wither away." And the Goddesses said, "Without Freya all will be gloom in Asgard."
They would have let the wall remain unbuilt rather than let the Stranger have the reward he claimed for building it. But one who was in the company of the Gods spoke. He was Loki, a being who only half belonged to the Gods; his father was the Wind Giant. "Let the Stranger build the wall round Asgard," Loki said, "and I will find a way to make him give up the hard bargain he has made with the Gods. Go to him and tell him that the wall must be finished by the first day of Summer, and that if it is not finished to the last stone on that day the price he asks will not be given to him."
The Gods went to the Stranger and they told him that if the last stone was not laid on the wall on the first day of the Summer not Sol or Mani, the Sun and the Moon, nor Freya would be given him. And now they knew that the Stranger was one of the Giants.