Gungnir (Old Norse "swaying one") is Odin's Spear. It is based on the weapon of the same name from Norse mythology which played a prominent part in many of the Norse myths and, in turn, the Marvel Comics continuity. It exists in the Marvel Cinematic Universe and is Asgardian in origin.
In battles against opponents of similar power, Odin carries the magical spear Gungnir ("The Spear of Heaven"), an artifact made of the metal uru, that can be used to channel the Odin Force. Even without the Odin Force it can still match Thor's hammer in battle. Once a year, during the Asgardian winter, Odin must undertake the Odinsleep for 24 hours to regenerate (and is closely guarded as he is vulnerable during this period)
Odinforce
Odin is capable of manipulating vast amounts of magical energy, referred to as the Odin Power, or the Odin Force, for a number of purposes. With this power, Odin is capable of feats such as reading minds from across even dimensions (as he was about to crown Thor king before he notices that Frost Giants were in his trophy room), projecting force blasts (mainly through either Gungnir or Mjolnir; it is unknown if he is physically capable of doing so without any of these items and even so, with his spear, he was able to destroy hordes of Frost Giants), and more. Odin is highly skilled in the use of his powers during combat situations, and was able to casually take down and kill Frost Giants with ease during the war. Odin's full power is thus considered at the least equal to that most every other "deity of Earth" (if they exist, which could be more than likely). Odin is also capable of placing multiple permanent enchantments on items, as he did for Mjolnir when he exiled Thor to Earth. He had to tapped into some form of dark energy to send Thor to Earth to stop Loki, although, it seems to frowned upon to used.
Weaknesses
While possessing the Odinforce that is inherently opposed to the need for outward sustenance, Odin must, once a year, during the Asgardian winter, undertake the Odinsleep for 24 hours to regenerate. During this time Odin is guarded closely as he is vulnerable to attacks from hostile forces such as the Frost Giants. Despite his limitations and weaknesses, such as the need for the Odinsleep annually, Odin is nonetheless the most powerful being in the Nine Realms.
