Operation Gehenna

Operation Gehenna was a campaign of Demiurge to allow Nazarick to place a foothold in the New World.

Background
After successfully defeating Sunlight Scripture, Ainz Ooal Gown felt inspired,

Tsuare Rescue Mission
Sebas Tian and Solution Epsilon had been living in the capital, acting as spies for Ainz Ooal Gown and were working undercover to gather information. During that time, Sebas discovered a young slave girl named Tuareninya Veyron and took her in. This drew the attention of Eight Fingers and after a series of events which led to the capture of their subordinates, the organization decided to kidnap the Tuareninya to lure Sebas out to be killed for his defiance against them. Ironically, their latest scheme proved to be the defiance against Sebas's master, Ainz who commanded his Floor Guardians to hunt the criminals down like the animals they were. Sebas joined alongside Brain Unglaus, Climb and Lockmeier to confront the Eight Finger's security forces, Six Arms. Sebas single handedly killed five of them while Climb managed to defeat the remaining one. Meanwhile, Mare and Entoma assaulted the mansion of one of the high ranking leaders of the organization and captured her.