Kamsa


In Hindu mythology, Kamsa was the tyrant ruler of the Vrishni kingdom with its capital at Mathura. He was the brother of Devaki, the mother of the god Krishna — who slew Kamsa. Kamsa is described as human in early sources and a rakshasa in the Puranas. His royal house was called Bhoja and another of his names was Bhojapati.
Kamsa was born to King Ugrasena a Yadava king and Queen Padmavati. However, out of ambition and upon the advice of his personal confidantes, Banasura and Narakasura, Kamsa decided to overthrow his father and install himself as the King of Mathura. Therefore, upon the guidance of another advisor, Chanur, Kamsa decided to marry Asti and Prapti, the daughters of Jarasandha, King of Magadha.
After a heavenly voice prophesied that Devaki's eighth son will slay him, he imprisoned Devaki and her husband Vasudeva and killed all their children; however Just before birth of the seventh child of Devaki and Vasudeva, Lord Vishnu ordered Goddess Mahamaya to transfer the womb of Devaki to that of Rohini, another wife of Vasudeva. Soon, Rohini gave birth to Devaki's seventh son, named Balarama. The eighth son, Krishna, an avatar of the god Vishnu, was transported to Gokul, where he was raised in the care of Nanda, the head of cowherds. Kamsa sent a host of demons to kill the child Krishna, all of whom Krishna killed. Finally, Krishna arrived in Mathura and slew his uncle Kamsa.

Birth

In reality, Kamsa was not the biological son of Ugrasena. Once a Gandharva with powers to read the minds was wandering, Ugrasena's wife was having sexual thoughts for her husband. Gandharva, able to read her mind transformed into Ugrasena and participated in the act with her. Ugrasena's wife realized that he was not Ugrasena which led to the gandharva revealing his true form. Gandharva tells about the power of the child who is going to take birth, describing this child being between a human and a Gandharva, however, an angered Ugrasena's wife in rage curses the child to become the ill-named Rakshasa. Gandharva fearing the curse being directed at him, adds to the curse and even he curses the child that he will be troubled by his own and flees the place. In fact, Kamsa in his previous birth was a demon called Kalanemi, who was slain by Lord Vishnu.
In childhood, Kamsa was trained by the other Yadavas, who were famous warriors, along with his eight brothers. Kamsa acquired Jarasandha's attention when the latter tried to invade Mathura. Kamsa single-handedly routed Jarasandha's army. The latter was impressed and made Kamsa his son-in-law. With Jarasandha's support, Kamsa became even more powerful.

Annexation of kingdom

During his wedding in Mathura, Jarasandha brought over his army to escort the Princesses Asti and Prapti. Using the army of Magadha as his political cover, Kamsa overthrew his father after he refused to voluntarily retire from his position. This was done within the confines of the royal palace and the public was not informed. After Ugrasena failed to show up for public events, Kamsa announced his coronation.

His warning issued by Yogmaya

In a prophecy, Kamsa was told that the eighth child of Devaki will kill him. Hearing that, he wanted to kill Devaki, but Vasudeva managed to save her life by promising Kamsa that he himself will deliver all their children to Kamsa. Kamsa accepted that promise and spared Devaki because she herself was not a threat to him. In the confines of the prison, Devaki repeatedly conceived and Kamsa cruelly murdered the first six children.
Just before the seventh child was born, Lord Vishnu ordered Goddess Mahamaya to place the seventh child of Devaki in the womb of Rohini. Thus, facilitating God Sesha's descent or avatar,the seventh child was raised by surrogate mother, Rohini and was named Balarama, Shri Krishna's elder brother. Whereas, Lord Shri Hari-Vishnu Himself, was soon to appear as the eighth son of Devaki, he ordered Yogamaya to take birth from the womb of Yashoda. Facilitating God Vishnu's descent or avatar, Yogmaya had put the guards of Kamsa to sleep or a state of trance. At that time also, Vasudev, obeying Shri Hari's order, took BalKrishna to Nand- Yashoda's house, bringing back the Baby girl, Yogmaya. Presuming this baby as Devaki's eighth child, Kamsa was about to kill her by slamming her down on the ground, but the girl slipped out of his hands. Taking her cosmic form, Yogamaya warned Kamsa, "The eighth child, who shall kill you, has been born. He is in Gokul!"

Death

The seventh child, Balarama, was saved when he was moved to Rohini's womb. The eighth child born to Devaki and Vasudeva was Krishna. Krishna was saved from Kamsa's wrath and raised by Vasudeva's relative Nanda and Yasoda, a cowherd couple.
After Krishna grew up and returned to the kingdom, Kamsa was eventually killed by Krishna, as was originally predicted by the divine prophecy. His eight brothers, headed by Kanka, were also killed by Balarama, and Ugrasena reinstated as King of Mathura.