David Cain is a DC comic book villain and an enemy of Batman.
David Cain is a member of the League of Assassins. Cain is one of the world’s most deadly assassins. He's been known to assassinate anyone who seems completely untouchable. He can take out some of the most famous and powerful people on the planet, no matter how seemingly impossible the task, making him one of the most dangerous members of the League of Assassins.