“We must now purify the barding by both material and immaterial means. For the material, we need to travel to Stratholme.
When it thrived, before the plague, it produced holy water capable of cleansing even the darkest of magics. There still may be caches of it lying untouched there that we can use.
Then it's just a matter of imbuing enough holy power into the barding to make sure it overcomes the will of Rivendare's mount, Shadowmane.
Travel to the service gate of Stratholme when you're ready.”
