Lord Kṛṣṇa, who specifically protects His devotees, saw that the whole population of Dvārakā was most perturbed by the presence of the great fiery demon. He immediately smiled and assured them, “Don’t worry. I shall give you all protection.” The Supreme Personality of Godhead, Kṛṣṇa, is all-pervading. He is within everyone’s heart, and He is also without, in the form of the cosmic manifestation. He could understand that the fiery demon was a creation of Lord Śiva, and in order to vanquish the demon He took His Sudarśana cakra and ordered him to take the necessary steps. The Sudarśana cakra appeared with the effulgence of millions of suns, his heat being as powerful as the fire created at the end of the cosmic manifestation. By his effulgence the Sudarśana cakra illuminated the entire universe, on the surface of the earth as well as in outer space. Then the Sudarśana cakra began to freeze the fiery demon created by Lord Śiva. In this way, the fiery demon was checked by the Sudarśana cakra of Lord Kṛṣṇa, and, being defeated in his attempt to devastate the city of Dvārakā, he turned back.
Having failed to set fire to Dvārakā, the fiery demon went back to Vārāṇasī, the kingdom of Kāśīrāja. As a result of his return, all the priests who had helped instruct the black art of mantras, along with their employer, Sudakṣiṇa, were burned to ashes by the glaring effulgence of the fiery demon. According to the methods of black art mantras instructed in the tantras, if the mantra fails to kill the enemy, then, because it must kill someone, it kills the original creator. Sudakṣiṇa was the originator, and the priests assisted him; therefore all of them were burned to ashes. This is the way of the demons: the demons create something to kill God, but by the same weapon the demons themselves are killed.
Following just behind the fiery demon, the Sudarśana cakra also entered Vārāṇasī. This city had been very opulent and great for a very long time. Even now, the city of Vārāṇasī is opulent and famous, and it is one of the important cities of India. There were then many big palaces, assembly houses, marketplaces and gates, with large and very important monuments by the palaces and gates. Lecturing platforms could be found at each and every crossroads. There were buildings that housed the treasury, elephants, horses, chariots and grain, and places for distribution of food. The city of Vārāṇasī had been filled with all these material opulences for a very long time, but because the King of Kāśī and his son Sudakṣiṇa were against Lord Kṛṣṇa, the viṣṇu-cakra Sudarśana (the disc weapon of Lord Kṛṣṇa) devastated the whole city by burning all these important places. This excursion was more ravaging than modern bombing. The Sudarśana cakra, having thus finished his duty, came back to his Lord, Śrī Kṛṣṇa, at Dvārakā.
This narration of the devastation of Vārāṇasī by Kṛṣṇa’s disc weapon, the Sudarśana cakra, is transcendental and auspicious. Anyone who narrates or hears this story with faith and attention will be released from all reaction to sinful activities. This is the assurance of Śukadeva Gosvāmī, who narrated this story to Parīkṣit Mahārāja.