I am a fan of Batman and justice league. I know the history of Ra' al Ghul, and that he restores his power from the Lazarus Pit.
My Question is: Does it make him immortal like Vandal Savage ? Or does he require the pit every time to restore his power?
If one time bath makes him immortal, then - since in Batman: Red-Hood Robin also took a bath in it - Robin should also be a immortal, shouldn't he?
If he is not immortal, then why does he say he is in Batman Begins?