Princes of the Apocalypse
Cult of the Crashing Wave
As of yet, it is not proven whether this group is nothing more than a small mercenary or bandit organisation raiding up and down the Dessarin.
They seem to have assisted the Cult of the Black Earth in moving members of the attacked delegation via the river but no evidence of further involvement has been found.
Currently, this group is situated in Rivergard Keep, an old, crumbling fortress that looks over the Dessarin River. It is also one of the old Haunted Keeps of the Sumber Hills. They are in the process of repairing it and seem intent in restoring it to its former glory.