Question: who gave azshara her power?
Answer: Azshara's Coronation and Sharas'dal Xavius promised Azshara that as long as she wielded the scepter, she would prosper. Indeed, the scepter brought her prosperity. One of the first acts with the scepter, named Sharas'dal, was to use its power to enhance Azshara's already enthralling beauty.