I was one of the winners of the 2019 One Page Dungeon competition at https://www.dungeoncontest.com.
I used one of my old adventures from Shotglass Adventures volume 1, which is available in print and PDF from DrivethruRPG (see the link below).
Here’s a copy of the adventure I submitted, which you can download by right clicking and saving. I had to change the name of the major monster because of the system-neutral guidelines of the competition, but it’s an Invisible Stalker. All the other monsters are in the D&D 5e MM.
For more Laidback DM, click here.
For Laidback DM products, in print/PDF/digital, visit https://www.drivethrurpg.com/m/browser/publisher/13989.