One of the best and certainly most iconic weapons in all of superherodom is Thor's hammer, otherwise known as Mjölnir (pronounced mee-yol-near). In the comics, Mjölnir is forged by Dwarven blacksmiths and is composed of a fictional Asgardian metal called "uru." Since there are no dwarven blacksmiths in real life (spoiler alert), master swordsmith and renowned propmaster Tony Swatton will show you how to actually make the Mjölnir for 'Thor 2' (or to smash watermelons).
While the cinematic inscription on Mjölnir states, "Whosoever holds this hammer, if he be worthy, shall possess the power of Thor," the actual prop only weighs about 10-12 lbs. Instead of using the fictional "uru," this hammer is forged from Chromoly, a high-carbon steel alloy containing chromium and molybdenum. The above video shows the process Swatton went through to recreate Mjölnir including a lot of things we don't understand like tig welding and electrochecmical etching. Whatever, the end result is awesome.
In the comics and the movies, Mjölnir is near-indestructable, with adamantium the only element it can't damage (see, 'The Avengers' when Thor's hammer hits Captain America's shield, made of an adamantium and vibranium alloy). When Mjölnir is thrown by Thor, it returns to him no matter what is in its path. In contrast, when Thor sets the hammer down, no one, not even Hulk, can lift it. With the hammer, Thor can summon the effects of a storm including lightning, rain and wind.
All in all, it's a pretty badass weapon and when you watch someone build it from scratch, it somehow becomes even more badass. And, if you stick around to the end of the video, you can see them smashing bones, Loki and even a few watermelons.
Check out Mjölnir this weekend as 'Thor 2' opens in theaters on November 8.