Mjolnir

In Norse Mythology, Mjollnir is the war hammar of Thor. When thrown at a target, it would return magically to the owner. To wield this formidable weapon, even a deity like Thor needed special iron gloves and a belt that doubled the wearer's strength. The strike of the hammer caused thunderclaps, and indeed, the name of this deity has produced the word for thunder in most Germanic languages. With the hammer, Thor indulged in his favourite sport of killing giants. Most of the surviving myths centre on Thor's exploits, and from this and inscriptions on monuments we know that Thor was very much the favourite deity of ancient Scandinavians.