After seeing a Meme about various creation myths, I found myself wanting to do a campaign world mythology where the main races were all crafted from some specific element by their gods.
Ysiries made humans out of barley, and from wheat, from which he also wove his home in the Divine Mountain. It is thus that humans are drawn to till the land, and are crafty and able to adapt, and their colors and styles are many.
Ysiries also made halflings, from cotton, giving then a soft appearance and thistles to defend themselves. It is thus halflings are drawn to comfort, and textiles.
Thograr made dwarves from rock and his sister Sifre made gnomes from gemstones. And when Thograr was slain by Gorrog, his blood spattered stone, from which game the deep races of duergar and svirfneblin, who never saw the smile of Sifre.
Gorrog made orcs from blood, and fire, that they would be quick to anger and strong in the face of the horrors to come. And he made goblins, from his phlegm, that they would be small and fast. And he made titans, from the bones of Thograr, tall and strong as the divine power they were carved from, but the sin of their creation lead the titans to devolve into the giants and cyclops, with whom the dwarves always feel great enmity.
And so on.