Alauddin Khilji was the second ruler and probably the most powerful monarch of the Khilji Dynasty. After conquering the throne by killing his uncle and predecessor, Jalaluddin Firuz Khilji, he continued his legacy of invading states and territories to increase his empire over the Indian subcontinent. He was the first Muslim ruler to successfully defeat and conquer southern parts of India. His passion for conquest helped him achieve success at wars, thereby expanding his influence to South India as well. In this endeavor of expansion, he was well supported by his loyal generals, especially Malik Kafur and Khusraw Khan. He ensured that he completely ousted the reigning kings and administered absolute power while invading the northern states. In south India, he used to loot the states and also extracted payment of annual taxes from the overthrown rulers. Besides his expeditions of raiding and conquering, he was engaged in defending the Delhi Sultanate from continuous Mongol invasions. Healso acquired the Koh-i-noor, one of the largest known diamonds in human history, while invading the Kakatiya rulers of Warangal. He also introduced some agrarian as well as market reforms which produced mixed results