Thor is the Norse God of thunder, lightning, storms, hallowing, strength, fertility, oak trees and protection of mankind.
Thor's hammer, Mjölnir, somehow ends up at Plutus' auction. The hammer is bought by fellow Norse deity Mr. Vili. However, Sam Winchester takes the hammer and kills two deities with it, the latter being Mr. Vili.
The current whereabouts of Thor and his hammer are currently unknown.