There are those of this world that tap into power unrestricted by the bounds of our mortal frames - powers of restoration, powers of life, and powers of light. And Bridenbrad, this is no ordinary man... his valor and devotion shine through. We can only hope that one of these beings will intervene and bring this hero back from a fate worse than death.
Go now and speak to Arch Druid Lilliandris in the Argent Vanguard... request passage to Moonglade and seek the aid of Keeper Remulos.
It is always a pleasure to meet heroes such as yourself in this forsaken land. Is there some form of assistance that I can offer you?
It's a pleasure to meet you as well, Arch Druid. I'm on a task from Tirion and time is short, might I trouble you for a portal to Moonglade?
Of course! Go with Elune's blessing.
I understand Tirion's request and trust in his judgment, we will see what we can do for this Crusader Bidenbrad. What you ask is no simple task - the Scourge are not of this world, and many have failed in attempting to strip their corruption over the years.
In a being of nobility and light, all is not without hope.
Additional: Sometimes the NPC bugs out and doesn't provide the portal to Moonglade for you, just stand on top of her and problem solved.