Dwarves

The Dwarves are an ancient race of skilled forgers and blacksmith's who hail from the realm of Nidavellir ruled by King Eitri. They are close allies of the Asgardians, and after being asked by Odin to create the mighty weapon Mjølnir they forged it for him.

History
The Dwarves are close allies of the Asgardians, having forged various weapons for their soldiers, the most prominent being the hammer Mjølnir.

Imir forced the Dwarves to create him a special axe which can match any opponents and break the fabric of reality. When Thor found out what Imir wanted, he battled and defeated him with his lightning strike. After his defeat, he lay on the ground in crisp from Thor's lightning.

Technology
The Dwarves are a very skilled and advanced race of smiths, able to create objects with properties that could be regarded as "magical" even by the Asgardians, like Mjolnir and Imir's axe.