It was forged by the Huldra Brothers, Sindri and Brok, who also forged Thor's hammer, Mjölnir, after feeling responsible for the destruction Thor wrought with his creation. As a weapon made to oppose Mjölnir's power and inspired by Jörmungandr's gigantic size, Brok suggests that the axe be called Leviathan.
make with blender... by the huldrabro.