According to Chapter 34, what makes Sai Baba's Udi so special?

Chapter 34 of the Shri Sai Satcharitra continues to describe the glory, qualities, and majesty of Udi. Its special power is illustrated through a story based on experience. The chapter states that Udi possesses the ability to cure even terrible and incurable diseases, such as a bone-cyst (Hadyavran), which could not be cured by any other remedy. The narrative emphasizes the belief that if Sai Baba applied Udi with his own hand, even the most incurable diseases would perish. The story of the doctor's nephew serves as a powerful illustration of this divine quality, presenting Udi as a miraculous substance that brings relief when all other human efforts have failed.