Odin and Vili and Ve killed the giant Ymir. It had to be done. There was no other way to make the worlds. This was the beginning of all things, the death that made all life possible.
Interesting to see significantly different cultures utilizing similar slain-god themes to create the Earth. Ymir's fate parallels China's Pangu (though he died of exhaustion after separating heaven and earth rather than of murder).
