Operation Fenfall begins at the Whispering Fen, led by Christofer Fyreglaive and the Luxors, to kill the desperate elder brain and subdue the illithid uprising. The team travels overland on horseback, with Malif riding a horse-sized bat and Mossback keeping pace on foot. Their protective mind wards are wearing off, so Dr. Mox joins as a specialist in defensive magic. Afterward, Christofer intends to integrate the illithid into the empire and expand east, using mind control if necessary.