The Skaal Test of Strength

Quick Walkthrough

 * 1) Speak to Tharsten
 * 2) Head to the Northeast part of the lake and speak to Korst
 * 3) Swim to the bottom of the lake and enter the cave
 * 4) Explore the caves and enter Aesliip's Lair
 * 5) Speak to the Draugur and agree to help him
 * 6) Destroy all the Atronachs
 * 7) Return and speak to Korst