Forgot to take my sertraline yesterday which, in addition to making my sleep awful, gave me some weird and very consistent dreams.
Pretty much the whole thing was about a three way war between some sort of infectious, sentient and malevolent matter (Like, it could spread to any other kind of matter slowly including humans), some sort of vaguely benevolent plants which fell by the wayside fairly quickly, and AI which was either benevolent or malevolent depending on the universe.
Earliest thing I remember was where the matter won, which resulted in it taking over the universe and blowing it up. This resulted in the creation of a multiverse where the same conflict was happening in each universe.
In one universe, the AI was benevolent and helping humanity colonise Mars. The matter wound up managing to infect the planet which resulted in a fight between the two, and eventually the AI "won" because it found out you can slowly convert the matter back to normal matter by using ultra high frequency sound, so it started producing devices that created noise beyond the range of human hearing to fight it off. It didn't completely destroy it because it kept coming back somehow, which dream me thought was bullshit. The colonisation of Mars continued with the war moving into the solar system, and eventually the dream moved into another universe.
This time there was a house infected by the matter. It didn't seem too interested in spreading beyond the house this time, but there was a person living in it who was slowly getting more and more infected. It was letting them keep their form for seemingly no reason beyond finding it amusing to make them suffer. He'd go and meet up with someone who was simultaneously me, my aunt, and Nanny Ogg from the Discworld novels on occasion. For some reason being infected would make him shit, and I'm talking mounds twice his own size. Dunno what was up with that. At the end of the day the matter would kill him and in the morning it'd bring him back to life, none the wiser.
Eventually he started trying to fight back, and the plant thing tried to help. The matter, however, having taken over both him and the house, kept doing things like killing him with spiked tentacles and turning him into some sort of I-have-no-mouth-and-I-must-scream style blob monster. After a lot of fighting he eventually managed to upload his brain with the help of the AI, who would then try to fight the matter. It didn't work, the AI revealed its goal was to actually be the only thinking thing left in the universe, and a glass dome in the garden took off to try and infect the rest of the world. The plant took the person, who was now uninfected, and followed in its wake. The matter noticed and killed them.
Final one took place in some Simpsons/BG3 hybrid world. Homer was infected but knew the way of killing the matter by high pitched sounds, and was also trying to shut down the infected nuclear plant. However, there was someone else who was infected but unaware of it, and didn't realise the matter was manipulating his mind to make him stop Homer. Instead, he was forcing Homer to do other stuff at gunpoint. Homer, knowing that he couldn't get past him, made a series of metal slides and said he was working on a park. He got himself and the other guy to both go down the slide, which started to destroy the matter because it was producing high pitched squeaking sounds. Kept repeating this for a while.
The BG3 came in now, when a party of heroes tried to take out the nuclear plant. Had a monk (me), cleric, fighter and ranger. They approached the plant and found some ducks. Had a nice conversation with them until their heads came off and tentacles erupted from them. Then a massive amount of spiked tentacles erupted from around the nuclear plant, which was now at the bottom of an amphitheater-esque pit. Combat started, which went badly due to the party being both underlevelled and outnumbered.
Repeat the fight with the same results a few times.
Eventually I decided the party should just get out of combat, so after the first round I told everyone to dash and get away. It worked, but everyone was now infected with the matter. Best way to get rid of it was to head home, so I started up that way but the police were after us. The best way to get home was to go via the sewers, which weren't your standard video game sewers where there's loads of space, but instead tiny pipes that you could just about move up by shuffling. Halfway there the police followed up the sewers and we had to hide.
Like so many other dream, unsatisfactory ending, this is where I woke up.