Shakuni also known as Subala, was the prince of Gandhara Kingdom in present-day Gandhara, later to become the King after his father's death and one of the main villains in the Hindu epic Mahabharata. He was the brother of Gandhari and hence Duryodhana's maternal uncle. He is believed to be an extremely intelligent but devious man. Shakuni is often credited as the mastermind behind the Mahabharata war. Shakuni had two sons named Uluka and Vrikaasur.The fact is that Shakuni was not actually fighting in favor of kauravas,he was avenging his father's death from by destroying the kuru clan,he was not in favor of kauravas neither the pandavas.
It is believed that Shakuni was the incarnation of Dvapara, the personification of Dvapara Yuga.