Dying pit fiend
Imprisoned in the ancient Thassilonian dam Skull’s Crossing for millennia, the pit fiend’s life force was being used to power the device. When the Heroes of Sandpoint infiltrated the dam, they found Avaxial nearly destroyed — there was not enough of its life force left to open the floodgates and save Turtleback Ferry from destruction. Avaxial bargained with them for his release in exchange for vital information on how the floodgates worked. The group was divided; not everyone was willing to release such a powerful evil back into the universe. Ultimately, the party agreed to release him. Avaxial was true to his word. Before returning to Hell, he told the party how to power the floodgates, enabling them to stop the flooding of Turtleback Ferry.