However, a safe entry point for sincere seekers is the from the Brahmanda Purana —a 37-verse hymn of protection. Recited daily, especially at twilight, it is said to build a field of tejas (radiant fire) around the practitioner.
And the roar? That is what happens when you finally, utterly, refuse to bow. narasimha vidya
This is : the supreme science of the Man-Lion, the Avatar who exists at the threshold where human reason ends and divine protection begins. However, a safe entry point for sincere seekers