What does the Shri Sai Satcharitra say about the healing power of Udi, especially for difficult illnesses?

Chapter 34 of the Shri Sai Satcharitra emphasizes the incredible healing power of Udi. It is described as a substance whose glory is so profound that it can cure even the most terrible and incurable diseases. The text specifically provides an example of a bone-cyst, referred to as Hadyavran, which could not be healed by any conventional remedy, including various native and foreign treatments and even surgery. However, as the chapter narrates, smearing Udi from Sai Baba's hand could completely uproot the pain and cure such an ailment, demonstrating its divine and miraculous properties.