Audra

“The old witch bears many giants for sons, and all in the shape of wolves; and from this source are those wolves sprung. The saying runs thus: from this race shall come one that shall be mightiest of all; he that is named Moon-Hound; he shall be filled with the flesh of all those men that die, and he shall swallow the moon, and sprinkle with blood the heavens and all the air; thereof shall the sun lose her shining, and the winds in that day shall be unquiet and roar on every side.”
― Snorri Sturluson