Do you want to compare Sif with Mephisto? Discover the powers, weakness & weapons of Sif and Mephisto from Sif Biography and Mephisto Biography. Find out all about Sif and Mephisto.# Check out how is Sif unique and distinct from Mephisto. Discover their love interest, sidekicks, family tree and the movies and games list in which Sif and Mephisto have appeared. Find out everything about them here!