Mirf will ask you to retrieve three Jade Golem crystals. These can be found on any undead monsters in Vermin's Snye.
Return to Mirf who asks you to slay Ayamia the Rat Queen in Vermin's Snye at ( 45, 0, -140 ) Copy/waypoint 45, 0, -140. She's a rare spawn, so you will probably need to clear the room multiple times to get her to spawn.
After killing her your journal will update instructing you to visit the Central Stairwell in Vermin's Snye at ( 120, 0, -109 ) Copy/waypoint 120, 0, -109.
Next, you must find the painting of Coldwind Cliffs, located at ( 187, -7, -90 ) Copy/waypoint 187, -7, -90.
After finding the painting, you will need to search and find the Sepulcher of the Prime Healer, located at ( 236, -7, -81 ) Copy/waypoint 236.00, -7.00, -80.55. WARNING: If the undead that lurk in this area aren't gray to you, you may possibly be ambushed at this point with a group of undead.
Enter the Sepulcher of the Prime Healer ( 237, -7, -81 ) Copy/waypoint 237, -7, -81.
Finally, you must visit the Tomb of Lord Tonmerk at ( 252, -6, -119 ) Copy/waypoint 252, -6, -119. At this point, you can click the tomb to zone in.
A discussion page exists which may contain more information