Collect a sample of air, fire, earth and water for Bath'rah the Windwatcher.
Bath'rah the Windwatcher has sent out a summons for a shaman of your wisdom. He requests you bring a sample of each of the elements to show you are ready.
To find Bath'rah, go to the river east of Tarren Mill. Follow the river north until you come across the ruins where Bath'rah resides.