Did your players finish your planned adventure an hour early? Do you need a quick transition scenario to bring the characters up a level before moving on? Tome of Horrors 2020 Instant Encounters are micro-adventures perfect for those need-it-quick situations that always seem to appear. All of them contain the illustrations and stats for the monster featured in the scenario, and many of them have maps as well.
Always roll a 20 on your Charisma (Gamemaster) saving throws!