|Powers and Abilities||Flight, Control over weather, Only allowed to be wielded by those it deems worthy|
|Team Affiliations|| Asgardians|
Mjolnir is the magical Asgardian hammer wielded by Thor. Mjolnir can only be picked up by those it deems worthy. Though, Hulk can pick it up through his unmeasurable strength. Thor used it to destroy a Chitauri Ship. He then used it to fight the main cannon of the Chitauri Command Ship. It allowed Thor to recharge the battery in Iron Man's chest after it was drained.
In the Comics
The hammer, while called Mjolnir, may not actually be the mythological hammer that the 616 version uses. Thor has a variety of weapons including multiple hammers. The hammer/ax hybrid seen here is simply one of them.
A wielder does not appear to be restricted by worthiness.