A bit late to the game, but just started exploring this area after returning to the game.
This task seems to actually be named "Where Underground" and begin with Assistant Vaglii
Flavor text: "They might as well call you a scout, because you'll be going out and doing some scouting on some very high-profile sites. These sites are rumored to be burial grounds for priests of an ancient civilization, but there's not much more information on them than that. Enough delay, get going and explore the pillars where you find the undead lair."
All of the other quest information already on this page is correct:
Explore the underground shore near the pier in the west - Crypt of Nadox
Stage is fulfilled near a fence in the water at -455, +1720.
Explore the buildings to the southwest of the fort - Gulf of Gunthak
Stage is fulfilled when you walk between the huts surrounding the fort, near -2100, +30.
Speak with Winon Glahar - Plane of Knowledge
When you zone in, your compass will point in his direction. He's at -120, +55.
The search for the Morticalidon won't end, not as long as intrepid explorers like you are on the trail. With this type of creature, you never know when or where you'll find it, but one thing is for sure -- finding it will be the most rewarding experience you'll ever have. In the meantime, here's payment for the time you spent searching.
You receive approximately 52 platinum.
This is just a placeholder as we have almost no information about this quest. We need all dialogues; task stages and descriptions; upper and lower level limits to receive task; any other missing information.