Complex sentence: Kamarile Maradim Nindar, like Nemene Damendar Boann, was a world renowned healer, however her expertise was the human mind and mental illnesses, something the One Power and other healing methods could not touch.
Split into simpler sentences: Kamarile Maradim Nindar, like Nemene Damendar Boann, was a world renowned healer. However, her expertise was the human mind and mental illnesses, something the One Power and other healing methods could not touch.