Legends accreted. Some said an Immortal once leapt over the moon; some said a woman traded her shadow for an entire winter. These stories are true in the only way legends are: they are useful. They guided children who would not otherwise learn the difference between hunger and longing. They cued midwives to remember a certain knot for placenta, and cooks to add a pinch of math to the batter so bread would rise even in thin air.