 Taken together, several stanzas from four poems collected in the "Poetic Edda" refer to Ymir as a primeval being who was born from venom that dripped from the icy rivers Élivágar and lived in the grassless void of Ginnungagap.Ymir birthed a male and female from the pits of his arms, and his legs together begat a six-headed being.The gods Odin, Vili and Vé fashioned the Earth (elsewhere personified as a goddess; Jörð) from his flesh, from his blood the ocean, from his bones the mountains, from his hair the trees, from his brains the clouds, from his skull the heavens, and from his eyebrows the middle realm in which mankind lives, Midgard.