As the eighteenth great battle loomed on the horizon, a formidable new threat emerged: a mighty Yavana, a foreign warrior sent by the sage Narada himself, appeared in the midst of the conflict. This Yavana was no ordinary enemy—he came at the head of three million fierce barbarian troops, unmatched throughout the world of men. He had heard of the strength and valor of the Vṛṣṇis, his equals in heroism, and now he besieged the sacred city of Mathura. Witnessing this dire situation, Krishna, accompanied by his brother Sankarshana, pondered deeply. He thought, “Alas, a great calamity has befallen the Yadus from both sides. This immensely powerful Yavana is besieging us today, and at any moment—today, tomorrow, or the next—the mighty king of Magadha, Jarasandha, will also arrive. If Jarasandha comes while we are locked in battle, he may slay our kinsmen or, being powerful, carry them away to his own city.” Considering the peril, Krishna resolved, “Today we must construct a fortress, one that is nearly impossible for men to approach. There, after settling our people safely, we will confront and destroy the Yavana.” With careful deliberation, the Blessed Lord set his plan into motion. By his divine power, he manifested a wondrous fortress—twelve yojanas wide—within the embrace of the sea: a city of marvels. In this new city, the artistry of Tvaṣṭṛ, the divine architect, was evident everywhere. Its streets, crossroads, and grand avenues were laid out with perfect precision, following the highest principles of architecture. The city sparkled with celestial trees and enchanting gardens, filled with marvelous groves. Towers of gold soared into the sky, crystal mansions gleamed, and magnificent gateways welcomed all who entered. Silver and gold turrets adorned the city, treasuries glimmered with golden jars, houses were crowned with radiant jewels, and vast platforms of emerald stretched out in splendor. Within this city stood the houses of the guardians of the directions and the residences of beloved women. People of all four varṇas filled its streets, and the homes of the Yadu gods themselves shone brilliantly. Indra, king of the gods, sent the Sudharmā assembly hall and the celestial Pārijāta tree to grace the new city—where even mortals, once they entered, were freed from mortal limitations. Varuṇa, lord of the waters, gifted swift, dark-colored horses that moved as quickly as thought, though their hue was gleaming white. The lord of treasures bestowed eight inexhaustible treasuries, and the guardians of the worlds contributed all their own opulences. Whatever lordship the Blessed Lord had previously granted to these deities for their own perfection, they now returned to Hari as he descended to earth. By his yogic power, Hari—Krishna—gathered all the people and, after consulting with his brother Rāma, the protector of the people, settled the Yadus safely in their new home. Then, garlanded with lotuses and unarmed, Krishna left the city gate. Śrī Śuka, the sage, describes the vision: As Krishna emerged, he shone like the rising moon, most beautiful to behold—his complexion dark as a raincloud, clad in radiant yellow silk. The Śrīvatsa mark adorned his chest, the Kaustubha gem glimmered at his throat. Tall and broad, with four arms and eyes like fresh red lotuses, he radiated joy and glory. His cheeks were full and rounded, his smile pure, his face as lovely as a blooming lotus, and his ears adorned with brilliant makara-shaped earrings. This was truly Vāsudeva, unmistakable by the signs foretold by Nārada—none other could be so. The Yavana, recognizing these divine signs, thought, “No one else could match the description given by Nārada. He is unarmed and on foot; I will fight him the same way.” With this resolve, the Yavana, burning with the desire to seize Krishna, pursued him as Krishna appeared to flee—though Krishna is unattainable even to great yogis. Step by step, Krishna lured the Yavana, always keeping just out of reach, leading him to a mountain cave. The Yavana, taunting Krishna as he ran—“Flight does not befit one born in the Yadu line!”—could not catch him, no matter how he tried. At last, Krishna entered the cave, and the Yavana, following closely, saw inside a man lying down. The Yavana thought, “Surely Krishna has been brought here and lies like a saint at rest.” In his ignorance, he struck the sleeping man with his foot. Awakened from a long slumber, the man slowly opened his eyes and gazed around. Upon seeing the Yavana standing beside him, his angry glance instantly reduced the Yavana to ashes, consumed by a fire born from within his own body. King Parīkṣit, hearing this tale, asked, “O brāhmaṇa, who was this man? Of what lineage and power? Why was he sleeping in the cave, and what was the brilliance that destroyed the Yavana?” Śrī Śuka replied, “He was Mucukunda, born in the Ikṣvāku dynasty, the illustrious son of Māndhātṛ. Renowned for his devotion to the brāhmaṇas and his steadfastness in truth, Mucukunda was once requested by the hosts of gods, including Indra, to protect them from the asuras, who were terrified by their enemies. For a long time, he served as their protector. Eventually, the gods found Mucukunda in the cave and said to him, ‘O king, please lay aside these hardships of protecting us. You have abandoned the world of men and a kingdom free of enemies; all your desires have been set aside in your service to us. But now, your sons, wives, relatives, ministers, counselors, and subjects—all those of your time—are no longer alive. Time, the almighty and imperishable Lord, is stronger than the strong; he brings all beings to their end, just as a herdsman drives cattle. Choose a boon, O blessed one—anything except liberation, for that is not ours to grant. There is only one Lord who can bestow that: the imperishable Bhagavān Viṣṇu.’ Thus addressed, Mucukunda humbly bowed to the gods, entered the cave, and surrendered himself to divine sleep. When the Yavana had been reduced to ashes, the Blessed Lord Krishna, best of the Sātvatas, revealed himself to the awakened Mucukunda. Mucukunda beheld Krishna, dark as a rain cloud, clad in yellow silk, marked with the Śrīvatsa on his chest and shining with the Kaustubha gem. With four radiant arms, adorned with the Vaijayantī garland, a beautiful, gracious face, and sparkling makara earrings, Krishna stood before him—a sight to delight all mankind, his eyes smiling with affection, eternally youthful, majestic like a proud lion, and full of noble prowess.