For some reason you decided to explore a sewer in the middle of the desert. Rather than landing in a pile of dried-out dervish fecal matter, you've discovered the hide-out of dervish thieves.
Notes[]
For the entrance: at the top of the Sandslide Passage, make a sharp left and continue along this upper shelf past the Rujarkian raider camps to reach the sewer grate way at the end.
Make sure to pick up the quest Hidden Cache if this is your first time entering this instance.
If you're going there for the Chrono-mission, you do not have to do the quest to complete the mission.
If you're looking for loot drops / transmuting, do NOT kill Mullok until last, the nameds seem to de-pop once he is down.