Odin

"Of course, Odin was the most unyielding of the gods. He looked terrible, a big tongue dropping out of his mouth. The painted carving made it look like Odin had been hanged, his tongue was blue. But then, Odin was the dead people's god. He was also master-of-runes and knew all the forces, both past and present."
(From The Slayer Rune)