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