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