"So long and trusted with the mighty hammer Mjølnir, forged in the heart of a dying star, it's power has now equal, as a weapon to destroy or as tool to build. 'Tis a fit companion for a king."
Odin to Thor, as he prepared to ascend to the throne of Asgard[src]

Mjølnir was a large, square-headed gray mystical war hammer with a short, round handle wrapped in brown leather with a looped lanyard in the end. It was the favored weapon of the Thor.

Uses and abilitiesEdit

Thor used Mjølnir for a variety of short range and long range attacks either by direct hits or throwing it. It returned to Thor whenever he threw it or summoned it, regardless of the impending obstacles and distance; even traveling through realms. Whenever dropped by Thor, it assumed a fixed position from which no one could move it except a "worthy" individual.

Thor also used it for directing his summoned elements such as lightning, wind, rain, and snow.