The Marvel comic book universe is awash with rare, fictional metals. As the Marvel Cinematic Universe (MCU) expands to introduce more characters (notably Wolverine), more metals will be introduced on-screen. Wolverine’s claws and skeleton are laced with a coating of adamantium. Magneto’s helmet, which prevents telepaths from reading and controlling his mind, is made of the same. Mjolnir (Thor’s hammer) is made of enchanted uru. Spider-Man supervillain Doctor Octopus has used carbonadium to create his tentacles, and Deadpool’s katanas are made of the same.