Now Sindri was quite ready to take up the challenge, but only on condition that Brock would blow the bellows for him. Loki now began to feel uneasy, for he had hoped the dwarf would decline to compete when he heard what were the gifts he had to improve upon. But Sindri only wagged his long beard at them contemptuously, and Loki's head began to tremble for the result of his wager.
So he determined to try and hinder the work.
Meantime Sindri had thrown a pigskin into the furnace, and had gone outside to find a magic charm, saying as he went:
"Blow, brother, blow with all thy might till I return, and stay not thy hand for an instant."
Directly Loki heard this he changed himself into a great stinging fly, and lighting on Brock's hand, he stung him with all his might. But the dwarf never stopped blowing, though he stamped and roared with pain. Then Sindri returned, and going to the furnace drew from it a golden boar of great size, which had the power of flying through the sky and scattering light from his golden bristles as he flew. But Brock did not know all this, and looked somewhat scornfully at the gift, saying:
"I thought you could do better than this."
"Wait a bit," said Sindri, and with that he threw a lump of gold upon the fire and went out, charging his brother not to stop blowing for an instant.
Then in flew Loki again, still disguised as a gadfly, and lighted on Brock's neck and stung him so that the blood flowed. But though the dwarf yelled with pain he did not cease blowing.
When Sindri returned he pulled out of the fire a fine gold ring. And this ring was made in such a marvellous fashion that every ninth night nine other rings would drop from it, so that its owner would be the richest being in the world.
But Brock did not know all this, and only growled.