Ra's Al Ghul is a villain from the Batman series. He is probably one of the most dangerous and mysterious villains that the Batman has ever faced, since he is nearly immortal.
Little is known of the early years of the nearly immortal Ra’s Al Ghul, whose name means “the demon’s head”, but it is known that he has lived for many centuries due to Lazarus Pits, mystical and alchemical brews that restore his youth. A capable master of strategy and organization, Ra’s Al Ghul’s goal is to save the Earth from ecological devastation by destroying most of its population.
He recognized Batman as both a worthy foe and a possible ally – except that Batman cannot accept his dystopic worldview. Batman also shares a love-hate relationship with Ra’s daughter, the beautiful Talia. (Note: Talia appears in Batman: Arkham City) Ra's heads the sinister terrorist group known as the League of Assassins which he uses to wreak havoc world wide.
◾Ra's Al Ghul said that he's over 600 years old. ◾In Batman: Under the Red Hood, Ra's al Ghul had a hand in creating the Red Hood, but unlike the Joker, he regrets his actions.