Here's how my Fury did it. Don't read if u don't want a spoiler.
Talk to Aurora in N Q, temp of Life. U need to go into the Down Below and kill Bloodsaber adepts, specialist and one other like that. But where do they spawn? U just run around and they spawn on u at certain intersections - they "ambush" u. Luckily I found a Cleric down there doing the same quest. We teamed up. I was 18 and he was 19 - not sure if I could have handled these fights alone - two yellow down arrows usually - but together we nailed them. They don't always drop the thing we needed, but it only took like six fights. Oh, u have to move through the intersections - I've heard if u stand still where they spawn they won't spawn.
Okay, go back to Aurora. Btw I'm pretty sure all priests do it this way. She sends u to find Sir Webly's tomb and stop the bloodsabers from animating him.
That's in Vermin's Snye. Zone into Down Below from a main city grate - and look for another grate on the ground. Once in VS go west and then north. U will come to spiral steps up - find a door that glows and says ... someting ominous sounding - I forgot what it said. But that's Sir W's tomb. Okay, u can't go in grouped. And there were lots of green or blue agro mobs, grouped, on the way there. A lvl 24 cleric buzzed by, and he was really nice and teamed w/ me - and led me to the door - and all those agro mobs turned gray cuz i was teamed w/ him.
Okay, u zone into the tomb. U see a hallway ahead of u and a flaming skeleton. And other skels lying down. Pull and kill the flaming Skel. It was yellow to me I think, but I didn't ahve much trouble. I just ran down the middle and didn't attack the lying down skels, they didn't attack me, and I got up to the corner ahead, where the hall turns left.
Okay, there are 3 more skels, even con w/ down arrow. And a human npc at a tomb or something behind them. U can't click on him unless u run up to him - but he's the guy u need to kill. Just charge him and concentrate on him. Let the skels whack u. He was yellow to me at 18. I had to regrow and heal myself a few times, but I had no probs killing him. Then I just zoned out - the door is right there. And that's it. U might have to go back and talk to Aurora.
Buff up before u go in - u should do fine. For FP priests - sorry - I have no idea what your quest is. GL.