sentences:  After Þjazi finds that Iðunn is gone, he turns into an eagle and furiously chases after Loki.The gods build a pyre in Asgard and, after a sudden stop by Loki, Þjazi's feathers catch fire, he falls, and the gods kill him.A number of theories surround Iðunn, including potential links to fertility, and her potential origin in Proto-Indo-European religion.