Xarabydun's Secrets

Difficulty:  10+ to survive, 20-25 to solo
Level Restriction:  1-25 only
Timer:  None on picking up Gems of Impulse, but 1 week to turn them in
Can be Solo'd?  Yes, with lockpick
Rewards:  Gems of Impulse, Discuses 

Xarabydun was discovered after the destruction of Tufa and Arwic, but only low level characters could enter it.  Explorers managed to open a tunnel into the town, but the deeper secrets of Xarabydun are still only accessible to characters below level 25.  You will need lockpick to enter the dungeon, although the locked door is in the non-level restricted area.

Dungeon 1 - Xarabydun Town and Sewers.  Make your way to the town, preferably via town gem.  Explore the town as much as you like, and when you are ready, find your way to a large room with a ramp going down to the north.  Go down the ramp, turn right and find another path heading down to the south.  You'll find the locked door here.  Pick it and enter the sewers.  The sewers are a maze, unfortunately.  Make your way north until you see a portal into the next region.

Dungeon 2 - Uninhabited Area.   From the drop, make your way around the winding passages and take your first right, heading up a ramp.  From here, hug the left wall.  You'll pass through several larger rooms, fighting Mites as you go.  You'll eventually encounter a Mite Warrior Princess - kill her and her companions.  Loot the Princess for some discuses and check the other corpses for a key.  Return back the way you came, through the first big room with the tomb in the middle.  Turn right and stop in the next larger room.  There is a locked door in this room - use the key to open it.  Pass through the door and into a smaller antechamber.  There are two more locked doors in this room - one to the north and one to the east.  The north door has a lever behind it and can only be opened with lockpick, but you can use the lever without opening the door.  Just target it and press your 'Use' key.  Head back to the Warrior Princess's room and head through the now-opened lever door to the west.  You'll find a portal into the last section at the bottom of the ramp here.

Dungeon 3 - Lightless Tunnels.  This final dungeon is filled with Knaths and their eggs, called Crystal Nodules.  You can turn these eggs in to Aino Lunnan Shin above  Xarabydun for a special gem that adds 100 mana for 3 hours.  Pick up as many as you like.  From the drop, turn right and then hug the left wall, until you head down a ramp.  There will be another ramp heading down in the middle of the next larger room.  Directly ahead of you is the Crystal Nodule room.  When you have as many Nodules as you want, you can either head out or explore more.  If you head back up the two ramps you went down and then find another ramp just ahead heading down to the right, you'll find a couple Shadow Children and a very deep pit.  Jump down if you like, but do not use the portal down there - it leads to the Valley of Death and the drop is very hot!  It is a very nice portal to have though.