Thors hammer and Odin's ravens, an Anthropomorphism of memory and thought.
"In Norse mythology, Mjölnir is the hammer of Thor, the Norse god of thunder. Distinctively shaped, Mjölnir is depicted in Norse mythology as one of the most fearsome weapons, capable of leveling mountains."
Odin's ravens. Mixed media (ink, watercolor, colored pencil on paper) , 24x32 cm
A Raven Insignia or Coat of Arms!!! by Scott Morgan