Mjölnir in the Norse Mythology is the hammer of Thor.
Thor is one of the main gods among the Vikings and it is the God of Thunder. Mjölnir, created by the dwarfs Eitri and Brokkr, is one of the most feared and powerful weapons that existed. It is for example capable to level a mountain.
A strike by Thor with his hammer never fails, a throw never misses and the hammer would always return in his hand ...
In the Norse Mythology, Tanngrisnir and Tanngnjóstr are the two goats who pull the chariot of Thor.