Odin Runes.

According to the legends, Odin was the one who invented the runes, the first alphabet used by the Nordic nations, whose characters, which meant mystery, were originally used for divination and powerful spells, although later they served to make inscriptions. Since wisdom could be obtained only at the cost of sacrifice, Odin himself relates that he was suspended nine days and nights of the sacred tree Yggdrasil, contemplating the immeasurable depths of Niflheim, submerged in deep thoughts, coming to wound himself with his spear , before acquiring the knowledge he wanted.

I know I hung from the wind-blown tree for nine full nights, pierced by the spear and Odin surrendered, myself to myself. No man knows what roots this tree was born from. They did not give me bread or drink from the horn; I looked down; I raised the runes, I raised them bellowing, I hit the ground again. When he completely mastered his knowledge, he carved magical runes on his spear Gungnir, on the teeth of his horse Sleipnir, on the claws of the bear and on countless other animate and inanimate things. And since he had remained suspended over the abyss for so long, he was then considered as the deity of those condemned to be hanged.!

(-Fhtagn)