In fact, a mind key is a brute force of SD; in some cases, a mind key is something stable enough that can be used as part of a general prompt. Then you can use several keys in sequence and create some kind of Mind-Key character, or Mind-Key environment or Mind-Key style.
However, in many cases the mind key is weak enough to be presented as part of a long prompt. In such cases, I use a condition that gives the mindkey full power for the first 30% of the generation, and turn on the rest of the prompt only after that.
and so let's say we have two mindkeys
(aipene) - some kind of flexible liquid substance of blue color similar to rubber tubes https://civitai.com/posts/1143784
(irapseb) - a demonic woman in black clothes similar in properties to Venom from the comics https://civitai.com/posts/1118560
It is necessary to take into account that mindkeys can differ from model to model and generate completely different things, sometimes completely losing their power. Although some of them are very stable in many models and produce the same results.
I will be testing these two mindkeys not in the same model where they were found, but in one that can replicate their general characteristics CyberRealistic 4
so let's move further. I will show you the sequential development of a prompt using these two mindkeys.
Let's take into account that for the negative prompt I use an improvement that takes effect only after a certain stage, when the main parameters of the mindkeys are used in the initial steps of image generation.
[: ugly , disfigured , deformed, tiling, poorly drawn hands, poorly drawn feet, poorly drawn face, out of frame, extra limbs, disfigured, deformed, body out of frame, bad anatomy, watermark, signature, cut off, low contrast, underexposed, overexposed, bad art, beginner, amateur, distorted face, blurry, draft :0.6]
so
irapseb materials style of aipene
image of irapseb, materials style of aipene, grotesque
as we can observe in a CyberRealistic 4 mindkey (irapseb) has lost its properties of a “woman” and only demonic infernalism remains
For further work, we can use one of the mindkeys for female characters to return the prompt to the intended theme
we will use faeakimuyo mindkey which is the key of a fantasy female character and works perfectly in the model chosen for demonstration.
enigmatic image of irapseb, materials style of aipene, 
enigmatic image of faeakimuyo irapseb, materials style of aipene,
enigmatic image of faeakimuyo, irapseb environment, materials style of aipene,
as we see, all three mindkeys take part in the process, there is a demonic irapseb environment, a fantasy female faeakimuyo character, and the influence of blue aipene flexible-liquid content.
Let's try to implement these keys in some interesting way
enigmatic image of faeakimuyo, standing in irapseb hall, dressed in aipene materials robe,
I think we can develop this theme by adding fine adjustments to the camera frame and lighting.
closeup halfbody shot, enigmatic image of faeakimuyo, standing in irapseb hall, dressed in aipene materials robe,
Let's add delayed quality enhancement and magnification by 1.5 to improve the overall image quality.
closeup halfbody shot, enigmatic image of faeakimuyo, standing in irapseb hall, dressed in aipene materials robe, [ :highly detailed, photography, ultra sharp, film, bokeh, professional, 4k: 0.4 ]
looks good, but how about reducing the influence of the demonic irapseb and increasing the influence of the blue liquid aipene ?
closeup halfbody shot, enigmatic image of faeakimuyo, standing in (irapseb:0.5) hall, dressed in (aipene:1.4) materials robe, [ :highly detailed, photography, ultra sharp, film, bokeh, professional, 4k: 0.4 ]
We see how the influence of the flexible blue fluid has significantly increased, but there is not much difference in the influence of the demonic fluid. Largely because the character itself is fantasy and has many elements of style from the very beginning.
Since our blue fluid initially has a certain physics, we can use the strengths of its nature by filling the space with a network of thin threads.
closeup halfbody shot, enigmatic image of faeakimuyo, standing in (irapseb:0.5) hall, dressed in (aipene:1.4) materials robe, myriads of aipene thin threads float in the air all around the character, field of view, [ :highly detailed, photography, ultra sharp, film, bokeh, professional, 4k: 0.4 ]
small image upgrade in Inpaint Automatic1111 (no changes to the prompt, I just regenerated the entire silhouette with the dress separately from the rest of the image to improve its quality, and then separately regenerated the face for the same purpose)
And with the help of three mindkeys we get a rather mysterious original character in some unexpected setting between body horror and fantasy. At the same time, it is enough in a light and romantic style.
After you read, you can look at the gallery of my posts. 99% of the posts are images generated from just one mindkey word prompt. there are many characters, locations, styles, built by just one mindkey.