You have done it! As I promised, here is the key to the Inner Sanctum.

Lightening Field? The Grandmasters would never shield the entry to their Council Hall in such an offensive manner! This Keystone opens the mechanical locks of Inner Sanctum gates, but this unholy energy field you describe is another matter. Regarding this impediment, I do not know what advice I can give. Perhaps someone in your time who has studied such things can provide a solution.

There are still too many warriors guarding the Keep. I cannot, in good conscience, give you the Keystone. Remember, your mission can only hope to succeed if you destroy at least a battalion each of the Windraiders, the Firebrands, and the Nightshadows - which means 75 of each type of these corrupted ones. Return when you have decimated their ranks.