Then I shall tell you of Þjazi, son of Olvaldi, and how he sat above the great oven of Odin, Loki and Hœnir as they, being hungry, tried to roast an ox. For Þjazi was a giant, and a great and terrible one, and in the skin of a vast eagle did he sit, and flap his wings, and kill the gods' fire before it could catch.
When Odin saw this he laughed, and invited Þjazi to join them at their feast, and Þjazi flapped his way down from the high tree-tops and ate his fill. He ate so much that Loki became angry, and hit him a mighty blow with his staff - so hard the stick lodged in the bird's feathers. How Þjazi squawked! He flapped his terrible wings and took to the skies, taking wicked Loki with him. And Loki was much afeared as his legs dangled beneath him, scraping the highest of the mountains of Midgard, and begged Þjazi to set him safely down. But Þjazi was an angry giant - a bitter one, and cruel - and would only do so if Loki lured the goddess Idunn (she who grows the apples of youth, which grant the gods their long lives) from her grove in Asgard.