The Flood of Fiends (5e)
This Adventure was designed so the only required resources are the players handbook and the D&D 5e system reference document (which you can find for free online). This is also a continuation of a previous adventure (link below). However it is not neccesary to play that first. This adventure should take about 1 hour to complete¸ and can be done with a group of 2nd level characters ranging from sizes 1-5 (but more players is certainly possible). All enemy group sizes scale based on group size¸ and there are some optional rules that can help make smaller groups more likely to succed. Previous Adventure (The Fiendish Felon): https://www.dmsguild.com/product/289539/The-Fiendish-Felon?term=fiendish&filters=45469_0_0_0_0_0_0_0