Pathfinder: The Kingdom of Darkness
Lanus indeed found these adventurers, and began his travels with them, waiting for his purpose to arise.
In Elidir, Lanus managed to successfully bring a newborn babe into the world, whom the mother named Lanus in his honor. A whippoorwill appeared before Lanus, leaving him a single black feather, as proof of Pharasma watching him.
Lanus has been given the charge of eliminating Pallos by Pharasma herself. After a long and arduous battle in Pallos’s extraplanar lair, Lanus was finally able to strike the lich down and send him to Pharasma for judgment.