I found a tome entitled, "Origins of Earth," 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 get buried in the process.
Repeatable
Catalogue the denizens of Vegarlson, the Earthen Badlands.
Catalogue a needlescale basilisk (in Vegarlson, the Earthen Badlands)
Catalogue a gemmed protector (in Vegarlson, the Earthen Badlands)
Catalogue an earthen tree spirit (in Vegarlson, the Earthen Badlands)
Catalogue a korascian mudhopper (in Vegarlson, the Earthen Badlands)
Catalogue an arborian temple priest (in Vegarlson, the Earthen Badlands)
Catalogue an arborian temple protector (in Vegarlson, the Earthen Badlands)
Catalogue a terrak temple enforcer (in Vegarlson, the Earthen Badlands)
Catalogue a terrak temple guardian (in Vegarlson, the Earthen Badlands)
Catalogue a vekerchiki combatant (in Vegarlson, the Earthen Badlands)
Catalogue a detritus mulcher (in Vegarlson, the Earthen Badlands)
Catalogue a sepulcher muddite (in Vegarlson, the Earthen Badlands)
Catalogue a sepulcher keeper (in Vegarlson, the Earthen Badlands)
Catalogue a crystallized sentry (in Vegarlson, the Earthen Badlands)
This last creature must be catalogued then destroyed!
Catalogue then defeat an Earthen 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.