There are four "Forgotten Catacomb" zones on the door; you want the second one.
If you need help with this zone read through our zone walkthrough.
Find the missing pieces:
First half of the Wurmbone Key: -321, -145, -320 in the back of Pyre's room
Second half of the Wurmbone Key: -321, -145, 139 in the back of Frost's room
Map: -580, -118, -89 at the Forgotten Statue's feet
Return to the Duality in Feerrott.
Take a world bell to Jarsath Wastes. Once you're there, speak to Brind at -312 -46, 1402 next to the globe on the Danak dock and pick the option of "Would you mind sending me out there? I'd like to speak to him if I could". Speak to Erus Dal'viv on the boat at -757, -50, 1900 .
Head east to -1125, 124, 2004 . Enter the cave and take the right fork then zone into Wurmbone Crag (Advanced Solo).