Ymir

Ymir is the first frost giant in Norse mythology and is important to the creation story. In the beginning of time he was formed from the primal ice of Niflheim, where it met with the heat from Muspelheim's primal fire and melteed, or from the mists rising from the rivers that flow from Niflheim.
The primal cow, Audumla, had four udders of milk which fed Ymir. Audumla licked hoar frost and salt from ice, eventually revealing Buri, father of Bor and the grandfather of Odin, Vili, and Ve.
Odin and his brothers killed Ymir. They made the sky from his skull, the earth from Ymir body; his blood became the sea and the waters of the earth, his bones the rocks, and his hair trees and bushes.