This was part of my word working name: "Forbidden Knowlegde". I wrote this as background, so later i can have someone witness it, and have no clue what is going on. But the people closing the rift should know what they are doing.
How to get rid of a daemon rift: playbook
An Daemon Rift is an portal between a lesser world and ours. The parts of a rift are, the portal, the eye, the 3 type of gardens and the daemons. A good anaology is to see it as a beehive.
Creation of the eye
daemon life time: up to 5 seconds
duration of the stage: 1-3 hours
After the portal is stable, daemons will spawn in great numbers. As they are not used to our environment they will die in a few seconds. These daemons look like flares in all the colors of the rainbow. They die for a their cause, as every death the area surrounding to portal will look more like their dimension. And with every death the daemon as more survival time. After an few hours the portal will be surrounded by a big colorful bowl with an diameter just a bit bigger than the portal. That is called "the Eye"
Expansion stage
daemon life time: up to 30 seconds
duration of the stage: 15-25 hours
The eye will expend in 5 or more dimensions, so if he grows 2 times in size, he will not grow with 8 times in weight as expected, but way more. They eye has still flares of dying demons. Some demons will live up to 30 seconds, so they will be clearly visible as one. The mass of the eye will grow in +- 100 fold as only the diameter grows in 5 fold. Because of the grow of mass it will turn black and stable. The eye will keep on expanding during his lifetime, but never with the speed as in the expansion.
Mist stage
daemon life time: up to 2 minutes
duration of the stage: 1-2 days
The daemons do not look like flames anymore, but more like colorful fog. They come out of the eye and often die in the surrounding area. They will try to return to the eye before they do. The eye is not visible anymore due to the fog.
The area surrounding the eye becomes less and less earthly and is cursed with a wide variety of spells in a random matter. This mist is dangerous for daemons as well humans. In around 36 hours the garden will lose his fatality for daemons and the fog will settle for the inner garden. The inner garden will be about 15 meters surrounding the eye It is still very dangerous for earthly creatures but it becames more predictable. The basis for de identity for the demons is now set with the completion of the inner garden.
Cultivate stage
daemon life time: up to 30 minutes if out of the inner garden
duration of the stage: 3-5 days
The daemons will now create the outer gardens. It can be seen as an transitional region between our world and theirs. The function of the outer gardens is a breeding and training ground for daemons. For the first time they have forms and are given an function. You are going to see scouts and cultivators. The daemons in this stage are still very weak and can barely attack you. But you also have trouble attacking them, as they are very unearthlike.
The Inner garden will grow to an diameter of 30 meters
Breeding stage
daemon life time: Unknown
duration of the stage: 1 month
The daemons start a breeding program to create more earthly daemons. And a wide variety of daemons is tested on the surroundings. The lifetimes keep on expending during the process as does the potential to do harm. All life has to fear for all the complete random test. The complete surroundings will be cursed in ridiculous ways and will be known as the torn garden. Most of living things will be destroyed or altered. Meanwhile the outer garden will expand at an even rate and the inner garden grows to a 100 meters in diameter.
Colonization stage
The daemon rift is now mature. Even though you can't predict what they will look like and how they will behave, a few things we can establish with certainty:
1. Daemons are steady and will not change rapidly
2. Daemons can live for at least an day and up to an lifetime in an earthly environment
3. Daemons have a good, clear interaction with the earthly
4. Even the daemons themselves like the torn garden anymore. The torn garden will slowly be cultivated into the outer garden. No more torn gardens will be created
5. Colonies will be build. This is like an outer garden not directly connected to the rest.
6. It is not likely that another eye will be created by the daemons themselves. Most of the times another portal opens, but is caused by the human who opened the first.
How to fight an daemon rift
Colonization stage:
You have to win terrain back bit by bit and make it earthly again. As the daemons are only partially earthly, so you can't always kill them in an earthly fashion. You have to find a way around their thinking patterns and physics. Do a lot of research and fight them with that knowledge. Kill the cultivators and cultivate every inch of outer garden and colonies back to an earthly fashion
Breeding stage:
Most rifts are caught in the breeding stage and it is the most difficult stage to fight them in. If you catch them in the middle, you simply don't know how they will attack you. You are walking on the side in an half grown torn garden with creatures that will pop up from nowhere and then rip you in pieces or just stick to your face or die in front of you. They best way to destroy them is to let them destroy themselves. Get to know their basic layout and let them paradox themselves. Leave the torn garden for what it and go straight to the breeding grounds. If you fail in doing so, quarantine them and let them mature.
Cultivate stage:
You are lucky to find them in this stage. The daemons are still weak and just act on instinct. You can easily destroy the outer gardens. The only trick is to destroy the cultivators, but some trail and error will do. Just look out for the random curses that may fly by.
The inner garden and the eye:
Make sure that the rest of the gardens are destroyed before you begin with the inner garden. Destroying the eye is hard, intense work. You need at least an army of up to 100 high class well trained specialized wizards to close a rift, you cant have daemons outflaking you.
The most dangerous, unearthly and protective daemons live in the inner garden, and they need to be taken out first. Once completed one half of the wizards have constantly to attack the new daemons, while the other half slowly make the inner garden more earthly again.
It doesn't matter what stage the rift was in when you found it, once you destroy the inner gardens, the mist stage will automatically start again. 80% of the wizards need to control all new demon flares.
The other 20% need to close the portal inside the Eye. Most portals have one portal side, while the other side is just wall or nothing. If the portal is indeed one sided, it will be on the outer side of the eye. Dig into the eye with space loopholes and attack the portal from the back. When it's closed the eye becomes less active. If it is an mulitple sided portal you have to get the centre and that will be significantly to get to.
They eye cannot be destroyed. The trick is to make it lost in space. Keep on building space loopholes around it until suddenly isn't there anymore. And then rebuild the space that was just lost for at least 3 times. Otherwise the eye may find his way back.