Rudra is the fierce form of Shiva, who is kind-hearted and merciful. 'Om Rudraya Namaha,' meaning, 'I bow to Rudra, the holy one,' appears in Sri Rudram in Krishna Yajur Veda. It is a simple yet powerful Mantra that pays obeisance to the mighty God, worshiped in 11 different forms. The Mantra chanted during meditation and worship can grant Rudra's Divine grace, mitigate adverse planetary effects, cure ailments and bestow a healthy life, rejuvenate the body, mind, and soul, and promote happiness.