Fall Harvest Moon
In the Asgard myth a builder offers to build the walls and palaces of Asgard in three years if he can have the sun, the moon, and Freyja. The gods tell him he can have one year and no help. He asks to have his horse help and Loki advises agreement. The horse works very hard and the gods see, with three days left, that the man might finish in one year.
(Thor & Loki being adoptive brothers is an idea from comics, not myth)
They panic and demand that Loki prevent him. Loki turns himself into a mare and distracts the man’s horse by neighing until he comes to her. Though he tried, the man did not succeed in catching his horse and flew into a rage. The rage revealed him to be a giant. Thor came back to Asgard and slew him.
Some time later Loki gave birth to Sleipnir, Odin’s eight-legged mount.
