This is Darth Krayt! Once he was a jedi knight called AīSharad Hett. He was born on Tatooine and lived with his father Sharad Hett in a Tusken- clan, but he was a human and Sharad was a famous Jedi, who stayed on Tatooine after his friends had thought he was dead.... But he survived and became chief of a tusken clan, which had tried to kill him. Sharad was killed by Aurra Sing and his son became the padawan of Ki- Adi Mundi. AīSharad fought in the Clone Wars and survived the orders 66. After that he returned to Tatooine and became the new chief of his clan. In a struggle Obi- Wan, who wanted to defend the young Luke, reaped off his mask. Therefor he wasnīt a tusken anymore, because he lost a hand and showed his skin. Eventually hefounded a new order of Sith and got the yuzang vong disease. The rest of his life he looked for an anodyne to cure his disease...