Gungnir

In Norse mythology, Gungnir ("Swaying One") is Odin's spear with runes carved on its tip. The spear was fashioned by the dwarves known as the Sons of Ivaldi under the mastery of the blacksmith dwarf Dvalin. The spear was obtained by Loki as a partial reparation for his cutting of Sif's hair. The spear is described as having the ability to always hit its mark. At Ragnarok, Odin will fight Fenrir Wolf with Gungnir, but the god will lose and be slain instead.


Source: Wikipedia