Mjolnir

History
Mjolnir is Thor's hammer, and can only be wielded by him. When Thor was banished to Earth as Dr. Donald Blake, he was chased into a cave were Mjolnir laid. Disguised as a walking stick, Blake could transform the hammer between the two forms.

Powers

 * Weather Manipulation : Mjolnir gives the wielder the power to manipulate weather, calling storms or calming winds
 * Flight: Mjolnir allows the wielder to fly