The Dirty Way to Destroy the Goddess's Heroes, Vol. 4 (light novel)

With all dirty schemes successfully deployed, Shinichi and his friends have finally gotten the church to agree to a temporary truce. Next up is…taking on the Goddess herself! Easier said than done, since they still have no leads on who she is or where she could be hiding. Their only hope is to locate a forest at the top of the Goddess’s hit list, known for housing the Elven Tomb. But Shinichi will need to tread carefully: The elves protecting the sacred monument are so hostile toward humans that even the undying heroes are no match for them!