Joshua Alston “Who’s your favorite artist?” asks Dre (Dominique Fishback) of the characters she meets along her journey in “Swarm,” Prime Video’s clever and fiendish horror satire. She poses the question with a cheerful lilt that belies the menace behind it, much like Ghostface when he conducts targeted phone surveys about the slasher genre in the “Scream” franchise. Dre’s respondents don’t know how high the stakes are, nor that there’s a correct answer: Ni’Jah, a messianic pop princess who bears striking similarities to Beyoncé, right down to the cultish following with zero appetite for dissent. Dre lives a mostly unexamined life in pre-pandemic Houston, fumbling through her 20s without much direction aside from whatever will get her closer to her favorite singer’s inner circle. Her roommate, Marissa (Chloe Bailey), is just as enamored of Ni’Jah, but is hustling as a hair and makeup artist to break into the entertainment field. Dre, meanwhile, bounces between dead-end day jobs when she’s not taking the stage at a gentleman’s club to perform dances that are more esoteric than exotic. Despite working as a stripper, Dre is mystified by sex, a curiosity Marissa’s creeper boyfriend (Damson Idris) uses to manipulate her.