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