I found a tome entitled, "Origins of Soil," in the Great Library of Myrist. It details much of Vegarlson, the Earthen Badlands' environs, but seems to lack anything of substance regarding the plane's inhabitants. I'll have to learn through experience, then, and try not to soil myself in the process.
Repeatable
Catalogue the denizens of Vegarlson, the Earthen Badlands.
Catalogue an earth emissary (in Vegarlson, the Earthen Badlands)
Catalogue a vekerchiki warrior (in Vegarlson, the Earthen Badlands)
Catalogue a warder of earth (in Vegarlson, the Earthen Badlands)
Catalogue an earthen amalgam (in Vegarlson, the Earthen Badlands)
Catalogue a vekerchiki drone (in Vegarlson, the Earthen Badlands)
Catalogue an arbiter of earth (in Vegarlson, the Earthen Badlands)
Catalogue an arborian temple minder (in Vegarlson, the Earthen Badlands)
Catalogue an arborian familiar (in Vegarlson, the Earthen Badlands)
Catalogue a terrak temple protector (in Vegarlson, the Earthen Badlands)
Catalogue an earthen mud elemental (in Vegarlson, the Earthen Badlands)
Catalogue a dustrunner (in Vegarlson, the Earthen Badlands)
Catalogue a sepulcher attendant (in Vegarlson, the Earthen Badlands)
Catalogue a sepulcher warden (in Vegarlson, the Earthen Badlands)
This last creature must be catalogued then destroyed!
Catalogue then defeat a Soiled Sludge (in Vegarlson, the Earthen Badlands)
Quest Rewards above are only the guaranteed XP, faction, and coin rewarded for this quest. Status points and rewards limited by class, race, alignment, etc. are unavailable.