In An analogous legend relevant to the start of Ayyappa, the demon Surpanaka earns the power to turn any one into ashes by his austerities. Yantras linked to wellness, such as the Mahamrityunjaya Yantra, is alleged to get healing Attributes. They may be used in rituals to safeguard against diseases https://www.youtube.com/@Mahavidyabaglamukhi