Kua-Toa. They’re essentially fish goblins for power, but so thematically interesting. First, they’re all insane due to mind flayer forkery. So nothing they do, in combat or for their plans has to be bound by rationality, you can, and should, run them bizarrely. And, each clan of them can be weird in their own way, so never just Goblins again, but another gang of fish goblins bizarre in yet a new way. Also, they use nets, whole gang of nutbags, tossing nets around. Some Ewokish stuff going on here.
And, they create minor gods with their minds. For real. A group of them, obsessed with some weird thing because they’re insane and creating a weird feedback loop devolving into the bizarre, Creates a god. How about that.
And, they’re sunlight sensitive, so underground, in caves, whatever, BUT, they used to live on the surface, before the mind flayer forkery, so they want to be near the surface, near the entrances to the underdark, they are in the hidden places, but right there, next to the normal place.
These guys have everything for low level mooks a party might encounter entering the weird, or coming out at night to grab people off the road, children out of their beds, whatever.
Kua-Toa are the best thing everyone forgets about.
