Berserker Army

The Berserker Army is an army of warriors of Asgardian origin that entered battle like raging beasts, destroying everything in their path.

It was said that a single berserker had the strength of 20 warriors, and they fought in a state of uncontrollable rage.

The source of their rage and strength is a weapon called the Berserker Staff

One of these warriors came to Earth to fight, but he ended up falling in love with life on Earth, and stayed behind when the army returned to Asgard.