Who was the 'great Avaliya' that finally gave the family a remedy for the bone-cyst, and what assurance did he provide?

The 'great Avaliya,' or saint, mentioned in Chapter 34 was Sai Maharaj of Shirdi, the King of Yogis. After the boy's parents traveled to Shirdi and pleaded their case, describing their son's terrible suffering, it was Sai Baba who provided the remedy. As the embodiment of compassion, he reassured the worried parents, telling them to remain worry-free. He gave them Udi and instructed them to smear it on the wound. Furthermore, he offered a profound promise of protection, stating that those who seek shelter in the Masjid shall never face downfall, even at the end of an era.