And the causes are likely to be mundane, not Crypto or extra terrestrial..
I found out that even eye floaters can be turned into evil monsters (evil bugs in my case), this took place when I had some cases of sleep paralysis.
Now, how I found out that they were not completely imaginary?
I do think that it is not so simple a matter of declaring things in dreams as demons. Some real issues can intervene and the brain is just bullshitting you like when AI large language models make up things because the brain tries to make sense of things by any means necessary at its disposal.
So I did have the usual, some days I open my eyes early and did see on the wall or roof of my room, a bug crawling. A bug that then increased in size and began to threaten me, I usually did wake up with sweats and a sore throat, caused by my screaming,
After a few rounds of that, I began to pay attention to how it usually started: the “bugs” began appearing as fuzzy spots or fuzzy lines that grew into monster creepy crawling bugs.
I looked for an explanation and remembered that a few floaters in my eyes looked like how the bugs started appearing, so I did made an effort to see if the bugs moved when I did move my eyes. They did.
One day I managed to remember my knowledge and do my plan, and sure enough, the bugs followed were I moved my eyes.
Before that, I had some lucid dreams with more control of the scenes, and I thought then: "Your ass is mine now, you Darth Maul Bugs!
And as an effective shortcut, I applied a Star Wars “Force” style maneuver. Because the bugs followed my eye moves, as the source was the eye floaters, the dream adjusted to make the bugs to be thrashed around mercilessly with the tables, walls, and other items, so much so that while I did enjoy it, I was beginning to feel a little bit sorry for those critters.
Not so much.. because when I figured that out, I began to look forward to those times early in the mornings! But of course. Your brain is an asshole… It began to stop doing those paralysis/dreams!
I have the theory that sometimes the brain enjoys giving your fears and concerns too much power in your dreams, and resents when you figure out a way to deal with the fears that it tosses at you.