To ensure the supply of Aether, an Aether Generator needs to be set up in the Nunglark Ruins. But the Balaur were already growing Drana there. You went to Skira, who gave you a solution to deactivate the Drana Growing Device. You poured Skira's solution on the Drana Growing Device, destroying it. Afterwards, you set up an Aether Generator, then reported back to Skira. She was pleased that you were successful.