Search Serpent Lake for signs of a drain. Return to Ysiel Windsinger at Cenarion Refuge with news of your discovery.
The schematics you've obtained show an underground system of drains and pumps that connect the lakes in the region to Serpent Lake.
What news do you bring, <name>?
You've done well in bringing this news to us, <name>. We will send a team to investigate this drain you've discovered. I have a different task for you in the meanwhile.
You may choose one of the following