* this is where the final mod idea starts. It is a combination of the Daughters of Hecate/Oroborous and the Nursery.
Back in the Mojave the player learns about there a rivaling alliance of tribals that is fighting against the Legion that are led by the enigmatic Daughters of Hecate.
There is also talk about a mysterious oasis somewhere in Colorado that preserves samples of pre-war nature that has capability of restoring it throughout the wasteland, producing plenty of food for everyone.
This place also holds the secrets of genetic engineering and could produce advanced medicine not seen since the war.
Deciding to investigate these rumors for one reason or another (perhaps some ranger thinks that the Daughters of Hecate could make a good ally against the Legion), the player heads to the region where the main body of the Daughters of Hecate and their servants; the Hounds of Hecate are camped.
Here the player gets to interact with the Daughters of Hecate themselves and some of the tribes that have allied with them.
The player learns that the Daughters provide the allied tribes with knowledge on agriculture and animal husbandry, and also provides medical aid including assisting with child birth.
Many of the tribes allied with Hecate have seen improvements in their crop output and healthier life stock, but they themselves have steadily becoming weaker.
The Daughters of Hecate tell them that its Caesar's Legion who are responsible for the tribes' weakening as they are capturing and enslaving the strongest and healthiest men and women.
In truth the Daughters of Hecate themselves are responsible.
Hecate, using advanced genetic knowledge that Diana taught her, has been breeding stronger men and women through eugenics.
She and her priestesses has been influencing the tribes on which men and women should have children, and then during child birth when only a priestess is allow to be present, switch healthy babies for weak ones in order to weaken the tribes.
These healthy babies are then taken into the cult of Hecate. Girls are to be trained as new Daughters of Hecate, becoming priestesses and healers, while the boys are taken into the Hounds of Hecate, an army that serves Hecate completely.
The player learns that Hecate is doing this as part of revenge against the Legion and the tribes that serve it, and to eliminate all other tribes until only her own is left.
Hecate herself was once a member of the Twisted Hairs, one of the most powerful tribes in Arizona/New Mexico that preyed on other tribes for slaves and tribute.
When the Legion arose, Caesar managed to convince the Twisted Hairs to join by promising them wealth and power. They did not realize that this was part of a plan by Caesar to eliminate the Twisted Hairs whom he saw a great threat to his Legion.
Caesar had made other tribes join the Legion by promising them that he would deal with the Twisted Hairs who had targeted these tribes in the past for slaves and tribute.
Once Caesar was done with the Twisted Hairs, he had his Legionaries, many of them former members of these tribes that held a grudge against the Twisted Hairs destroy them. The survivors were put on the crosses along crucifixion road as a warning to others who could threaten the Legion.
Only Ulysses and the woman who would become Hecate survived.
Hecate fled into the wasteland when her fellow tribe members were betrayed and slaughter.
Half dead and having lost most of her mind other than the memories of the betrayal that kept her going she stumbled into Colorado and came across the Nursery, an oasis of the likes she had never seen before.
There she met Diana, the cyborg custodian and protector of the Nursery who took care of her and healed her back to strength.
The woman shared her stories with Diana and in return asked about Diana and the Nursery.
Diana would share some of her knowledge with the woman including the science of selective breeding, and would give the woman a new name after she had forgotten her old one; Hecate.
While Diana offered Hecate to stay in the Nursery, Hecate who had regained her strength and a burning desire to take revenge against Caesar, his Legion, and the tribes who betrayed the Twisted Hairs decided to leave, planning to use the knowledge Diana had taught her to create an army of her own that would one day march against the Legion and its allies.
Those that would serve her she promised to take to a place with plenty of food and water as a reward.
Hecate's camp is guarding the entrance to the Nursery, and the player will have to get past it in order to get into the Nursery itself and get to speak to Diana.
The Nursery is revealed to be a Vault that was designed by pre-war scientists to preserve seeds and genetic samples of the pre-war biosphere, with the purpose of reseeding these after conditions in the wasteland have stabilized sufficiently to make it possible.
For this purpose the Nursery is fitted with all kinds of advanced technologies specifically developed for these goals such as a vast biological archive with samples of hundreds of species, and the means to clone or grow these organism until they had matured enough for release.
The Nursery also has advanced genetic labs for the purpose of modifying pre-war organisms to make them able to adapt and survive to the wasteland, and to analyse retrieved genetic samples from newly developed organisms in the wasteland, including bacteria and viruses, and develop counter agents to these.
The Nursery also contains various biomes that hold plants and animals the world has not seen since the war, some of them having been restored with the technology of the Nursery.
The Nursery however is failing. Its systems have suffered damage over time, some of it caused by mutant plant and wildlife has found its way into the Nursery and has been supplanting the pre-war organisms.
Diana has lost control over most if not all of the robots in the Nursery. These are now stuck in their standard programming.
In desperation she has called out for help (perhaps this is the signal the player received that starts this mod), for people to come and help her restore the Nursery before it is completely lost.
(I had in mind that Diana tried to contact her wards; the Twin Mothers tribe, not knowing that they have been conquered and assimilated into the Legion, to have them come to the Nursery)
The player can choose to assist Diana with restoring the Nursery, or ignoring that goal and focusing on their own pursuits
Interacting with Diana, she reveals to the player that she was a pre-war geneticist who volunteered to become the custodian of the Nursery after she learned that she was suffering from advanced stages of cancer.
While her body could not be saved her brain could be preserved, and when tied into the Nursery's computers, oversee it and its robots, and carry out the mission of restoring pre-war nature to the world after the worst of the after effects of the war had passed.
She also tells the player that she has also been doing research into the New Plague after the overseer of a vault got into contact with her when its population suffered an outbreak.
With the information provided by the Vault's medical personnel Diana was close to developing a cure, but then lost contact with the Vault before they could send the last crucial information Diana needed.
(if the player has visited Denver and its Vault, the player can give Diana a copy of this information)
The player can inform Diana what Hecate has been up to since she left the Nursery, and how she has been using the knowledge Diana taught her.
The player can also tell Diana about Caesar's Legion (and that they conquered and assimilated the Twin Mothers' tribe)
Diana may decide to intervene as she realizes that Hecate has abused Diana's gifts to her, and that the Nursery would be plundered by the tribes serving Hecate when she leads them into it, preventing it from carrying out its true purpose.
With the help from Diana the player can expose Hecate and her manipulation of the tribes, and convince her Daughters, Hounds, and allied tribals to abandon her and her desire for revenge.
The player could also perhaps convince the tribals to serve Diana instead.
Diana would invite some to come to the Nursery where she starts teaching them knowledge on how to survive and thrive in the wasteland, providing them seeds for crops, and also trying to undo some of the damage Hecate caused.
In return these tribals help Diana with preserving and protecting the Nursery.
If the player also provided Diana with the knowledge to complete a cure for Limit 115, Diana's labs create a modified plant which fruits contain the cure.
The tribals serving Diana would start distributing these throughout the wasteland and put an end to the Limit 115 outbreak.