Maggie
Begin with ghast (maurezhi) fight.
Explain how maurezhi work.
The maurezhi is in the process of eating a body, its current skin dripping off its body.
As it turns, the party sees that its face is in the process of assuming the form of the new corpse...Howalyn.
(Weslocke orchestrates Howalyn's murder under a magically influenced direct order from Bathym, killing her last tie to the material plane)
Blue dragon???
Merchant near the caravan is Elias (Human). There is a skeleton nearby covered in acid that used to be his business partner.