The Sensei is an immortal martial artist and member of the League of Assassins, formerly the society's leader. He is the father of Ra's al Ghul, making him the grandfather of Talia al Ghul and the great-grandfather of Damian Wayne. He is able to stay alive for centuries using the Lazarus Pits, and this experience has made him one of the world's deadliest fighters despite his old age. Sensei was created by Neal Adams, first appearing in Strange Adventures #215. (1968)
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