Mjolnir is depicted in Norse mythology as one of the most fearsome and powerful weapons in existence, capable of leveling mountains. In its account of Norse mythology, the Prose Edda relates how the hammer was made by the dwarven brothers Eitri and Brokkr, and how its characteristically short handle was due to a mistake during its manufacture. Similar hammers (Ukonvasara) were a common symbol of the god of thunder in other North European mythologies.