The Asgard Cleaver
The Asgard Cleaver is the fabled Greataxe of the Berserkers. The blade is made out of an unknown metal (is presumed to be a metal thats similar to Mithril but looks like gold and bronze combined) and is encrusted with multiple jewels upon parts of the blade and handle.
The axe is said to be forged by Odin's son Thor and smelted using the flames of Surtr.