The Frost Gate (mission)/Zaishen Quest

Summary

 * Open the Frost Gate in the Northern Shiverpeaks.
 * *BONUS* Secure the siege secret weapon plans.
 * *BONUS* Complete the mission in Hard Mode.

Dialogue
Stone summit dwarves control the Frost Gate in the Northern Shiverpeaks. These renegades cannot block passage to Kryta!
 * Accept: I can do that!
 * Reject: No, I'm way too busy today.