Death Man was a Batman villain who menaced the Dark Knight and Robin in Batman #180. A couple of months later Death Man became Lord Death Man and popped up in Japan's manga version of Batman.
More recently, Lord Death Man appeared in Grant Morrison's Batman Inc.
Now, Lord Death Man, master of secret yoga resurrection techniques, has his own theme song courtesy of Sam Mickens.
Lord Death Man by Tchalla
You can learn more about Mickens song and album at Comics Alliance and at his website.
Comics Alliance also has a great overview of Lord Death Man HERE.