The Greater of Two Evils

You wish to know what the visiting doctors were up to. I can learn you more of their dealings here, but to do that I require ingredients for my scrying bowl. Bring to me the eye of a Troll afflicted by that which plagues the peasantry, a pelt stained in both color and with that which pours from the north, and finally a fire that breathes underwater.

Collect the following: an eye from a Plague Troll by the lakes in southeast Troll Country; a mossy pelt from a Putrescent Ungor near the Ruined Elven Tower in northeast Ostland; and a Firebrush from Shadowlake, near central Ostland. Return to Ragnhilder in the Marshland Graves when all have been gathered.