Xiao Fen

Xiao Fen was a swamp that sat in Norune Valley along the Xiao River, just north of Ordogan Village. Xiao Fen was a Fey Crossing, a space that existed in an overlap between the Material Plane and the Feywild, meaning that creatures from either plane could enter Xiao Fen, but would return to their home plane upon leaving. The Promise Crew explored Xiao Fen extensively while searching for the source of the Fey curse put over Ordogan Village.

The Grey Messiah's Keep
After the Grey Messiah had assembled a force of Darklings, they took over an abandoned keep in Xiao Fen. The Promise Crew stormed the keep with the help of the Satyrs, and discovered a swarm of research done by the Grey Messiah. A Shield Guardian exploded, destroying much of the research.

Minch's Tomb
Minch was buried in a small, rocky cavern not far from his home in the valley. Minch's Tomb was the site of the final showdown between the Grey Messiah and the Promise Crew, and was the resting place of Aegis before the Grey Messiah removed it.

The Lair of the Endrega Queen
The Promise Crew encountered the Lair of the Endrega Queen while exploring Xiao Fen, and after defeating the Endrega Queen and her offspring, the Lilac Nymph was able to craft armor for Keth.

The Thundersplit Tree
The Thundersplit Tree was a charred, seemingly dead tree rife with magical energy. It sat atop a hill in Xiao Fen and was the home of the ghost of a man named Cassian. In life, Cassian was to meet a lover here to elope, but was killed when the tree was struck by lightning. Upon learning the fate of Cassian's lover, Frath disguised himself as her and convinced Cassian to move on. For this, the party was gifted Cassian's Pike - a magical pike that can deal lightning damage.