The adventurers find a harpy nest.
As you near the end of the wetter portion of your journey, the mist-veiled western marshland slowly gives way to the rocky foothills of the Brokenveil Bluffs. Sharp crags and steep foothills are visible ahead, as are the openings to what must be hundreds of natural caves.
Life is particularly difficult in this section of the swamp, where avian predators and winged monstrosities from the bluffs roam unfettered through an open sky. If Morgid is still with the party, he warns the characters to be on their guard.
[Two harpies try to lure adventurers in at a time. The goal is to get all of them to the nest to be attacked.]