Thorne drops a few barrels of red dye in the town water supply early in the morning. Within a few hours, the tension has ratcheted up even further, and there is palpable panic in Fort Inevitable. During the day, Daryle and Darelle go to the Temple of the Golden Key and purchase several potions of cure heavy wounds, cure medium wounds, and cure light wounds. Both sisters anticipate that the battle with the Vault Keeper will be a tough one. They also purchase potions of invisibility from Falandra, who has just brewed a new batch. Darelle then goes to Abernard's house. The sorcerer is there, reading a book on his porch. Darelle shoots the breeze with him for a while, then asks him if he could identify an item for her. He agrees, and examines the hand Darelle discovered in the Emerald Spire. After a few moments, Abernard tells her she's the owner of a hand of glory. Darelle thanks him.
Following his failed attempt at leading his cultists to the Emerald Spire, Rowen grabs his scrolls of magic missile from his ruined estate and returns to Fort Inevitable. Kazmauk remains outside the town's walls at the Hunters' Lodge and awaits the return of his sisters with trepidation. He's ready to return to the Emerald Spire. Omok continues to read the Book of the Damned, hoping to unlock all of its knowledge.
The Cooper sisters finally return, but it is too late to leave the Hunters' Lodge. The group decide to head out early in the morning.
Erastus 1, 4712
Awake before dawn, the Coopers realize that Olifrit is gone. Instead of the gnome, they find a Gerald in the building. This Gerald wears priestly robes and seems saner than some of the other versions they have encountered in the past. The Coopers wonder how he eluded security and entered the lodge, but after a short discussion, the rest of the group agrees to take Gerald with them They begin the trek to the Emerald Spire. Each of them experience a sense of foreboding. This could be the day they triumph over the evil that dwells at the root of the Emerald Spire, or this could be the day when their adventure comes to a permanent end. It takes them out of the morning, and the Coopers give the Spire a wide berth, hoping to avoid the large giants and goblins encampment at the base of the Spire. Their circuitous route allows them to not be seen from the Spire, but they also can't see it. They enter through the secret tunnel leading to the Splinterden level. From there, they use spire tokens to travel to the Vault, the sixteenth and last level of the Emerald Spire.
Arriving at the base of the Spire, the Coopers first stop by the strange creature that looks like a pillar of stone. Ooviroon is happy to see the Coopers return so soon, and he asks them for news of the outside world. Darelle reports on what has happened in Fort Inevitable, and questions the outsider on the happenings down here. Ooviroon has no news. He's now happily digesting the remnants of the grugs the Coopers killed and fed him a few days back. Darelle questions him on the origins of the Spire. Oorivoon explains that eons ago Vault Builders, which hailed from the Plane of Earth, arrived on Golarion shortly after its creation. Using seeds of crystallized magic, they seeded the planet with vaults, spaces where they could study the nature of life. The Vault Builders were responsible for creating numerous spaces throughout Orv, Golarion's third and lowest level. When the Vault Builders departed following their war agains the Aboleth, a Vault Keeper was left behind to guard the Emerald Spire. Named Iluchtewhar, this Vault Keeper has slowly gone insane over the eons, according to Ooviroon. Oorivoon further talks about what motivates Iluchtewhar, and mentions that as an outsider from the elemental plane of earth he is vulnerable to bludgeoning.
Tired of these arguments about the best way to penetrate the sphere, Darelle uses a hammer and chips away at the stone wall. Surprisingly, the wall crumbles easily. Kazmauk grabs tools and also begins to bash away, and soon most of the Coopers are at it. After half an hour, they emerge on the other side into a small cavern. Inside they discover a small fey floating on air. She introduces herself as Eriniell, and she invites them inside. She also informs them they must not touch the floor as Iluchtewhar can sense their thoughts when they are in contact with the earth. She tells them she used to be one of Iluchtewhar's servant but eventually realized that he had been corrupted by the Spire. She has been hiding behind this barrier, protecting herself from the Vault Keeper, hoping to strike at him when the time was right. The Coopers, sensing a possible alliance, tell Eriniell that the time is now, and manage to convince her that today is that day. She agrees, and mentions that Iluchtewhar is dwelling beyond this room. The Coopers ask how they are supposed to go there. Eriniell tells them they could travel through the roots that spread around this level, but she has the ability to dimension door to his lair. After some negotiations, she agrees that she and her children will transport the Coopers to Iluchtewhar's personal chamber by means of this spell. Darelle then notices that there are several invisible stalkers in the room with them, all hovering behind the fey. The Coopers are ill at ease but decide this seems the best plan.
As they speak with the fey, whispering of wind causes Rowen to change personality and he becomes very self assured. Eriniell casts dimension door and the Coopers and their allies arrive in Iluchtewhar's room. Eriniell immediately engages in combat, and the Coopers join in. Kazmauk hits with sword but realizes that his attack is ineffectual. Only magic and blugeoning will hurt Iluchtewhar. Darelle and Thorne unleash a torrent of magic missiles, while Kazmauk engages with his lesser weapon. Omok joins in, and Rowen casts a few spells as well. Iluchtewhar replicates against the party by unleashing a blast of razor-sharp crystals that strike everyone but Thorne. He also summons earth elementals to fight on his behalf. Daryle engages one of the elementals, while the other strikes at Omok. The party is quickly depleted of healing spells, and finds itself on the tethering edge of doom. Iluchtewhar has suffered massive hit, yet he is still standing. It is clear, however, that he is slowly maneuvering himself towards a side door to escape the room.
While fighting, Rowen hears sounds coming from the hallway leading to this room. Is it reinforcements? Daryle moves away from her earth elemental long enough to spike the doors close. As combat rages, one of the Coopers nears death, followed by another one. The Coopers have met their match and will surely perish.
Suddenly the door explodes outward, crushing Rowen beneath a ton of splintered wood and rubble. Duke Mosley enters the room, resplendent in a dust-free and shiny uniform. Mosley does not look sick in the slightest. Followed by a horde of Hellknights, he greets the Coopers and unleashes a wave of healing, restoring everyone's strength. Kazmauk turns around and deals the death blow on Iluchtewhar, who explodes in a shower of sparks and green crystal dust, hurting everyone with debris. The Coopers are surprised to see him Duke Mosley. The Duke tells them that he has been faking his near-death to fool his enemies into thinking him weak. His plan was to capture the Spire all along, and now thanks to the Coopers' valiant efforts he controls the structure. He tells them that war is coming to Cheliax, and he will use the enormous power of the Spire to attempt to dethrone his mother the thrice damned queen, Queen Abrogail Thrune II. He is grateful to the Coopers for their assistance, and he invites them all to a banquet tonight to celebrate his brilliant victory. All, except Gerald. He tells the sorcerer that he will give him and his myriad copies a day's head start, then it will be hunting season.
In a private conversation with Daryle and Darelle, Duke Mosley informs the sisters that while his forces have been assaulting and clearing the Spire, the former Lady Commander Audara Drovust has been leading the quarterly relief force of Hellknights against Fort Inevitable, hoping to catch Mosley dying in bed with a small guard protecting him. This force left their planned itinerary at Daggermark and seized Mosswater before trekking to Fort Inevitable. Unfortunately she encountered a force of goblins and giants equipped with emerald automatons, and both forces are fighting within view of the Fort. Furthermore, he lets them know that a rebel force has seized control of Fort Inevitable and removed the few Hellknights who did not switch allegiance. As it is, both Greenhide and Drovust will exhaust themselves against each other, and the victor will be unable to seize the town back. Mosley tells them his own army has suffered some losses, but are now encamping in the Spire and will not be challenged by Drovust, Greenhide, or the rebels in Fort Inevitable. He apologizes to the sisters to have made them pawns of his plans, but as a thank you he recognizes that the Hellknights' possession of Fort Inevitable has now run its course and he agrees to leave the town alone. After all, he will need all of his strength and manpower to secure the Spire and study it.
Upon this news, Darelle sends a message with her tree token to Dr. Mordel reporting what has transpired at the Spire. with message of new management. Rowen, who explores the next room, finds a strange device. Duke Mosley, who enters the room, chats amicably with Rowen and they discuss the purpose of the device. A large map shows the entirety of Golarion with blinking spots scattered throughout. When Rowen begins touching parts of the Orvgate, a potent artifact that allows travel to other Vaults throughout Golarion, Mosley backs away. The necromancer pulls the first lever, which lines on a specific Vault that appears to be in the expansive jungle of Mwangi. As soon as Rowen touches the second lever he is transported far and away to that Vault. Mosley shrugs and walks away.
Thorne, sensing his opportunity, swiftly melts in the shadows and leaves the scene. Making it back to Fort Inevitable, he retrieves a few items and flees the area, motivated either by Duke Mosley's revenge or the ire of his sisters ...
Darelle notices that the green dust that used to be Iluchtewhar begins slowly drifting on the floor. She uses windwall and blows it all away. The Coopers have successfully conquered the Emerald Spire, but so much unanswered questions remain!