Frostmaw the Kinslayer/Zaishen Quest

Summary

 * Kill Frostmaw the Kinslayer in Frostmaw's Burrows.
 * *BONUS* Kill Frostmaw the Kinslayer in Hard Mode.

Dialogue
Kill Frostmaw the Kinslayer in Frostmaw's Burrows.
 * Accept: "I can do that!"
 * Reject: "No, I'm way too busy today."