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