Thor Odinson was about to become the king of Asgard...until the fearsome Frost Giants attacked. Seeking revenge, Thor and his companions journeyed into the frozen land of Jotunheim, which almost led to a brutal war between the realms. In order to teach his son a lesson, Odin Allfather stripped Thor of his power, took away his mighty hammer, and banished him to the realm of Midgard, also known as Earth.