Lab 113: The Teacher's Research Facility

The lab they fear is finally open. Will you survive what's waiting inside? In the shimmering desert sanctuary of New Arcanum—a city built on arcane calculus and floating laboratories—a dark secret has been unearthed. Lab 113 is the final stronghold of the Slumber Cult: a place so horrifying that even captured cultists refuse to speak its name. The Teacher has vanished, leaving behind his Pet: a terrifying monstrosity named Jeffery that stalks the halls with murderous glee. As you navigate the blood-stained research rooms, you realize the walls are watching you. To survive, you must scavenge for volatile ingredients, decipher cryptic journals, and brew a secret serum to strip the beast of its invulnerability—before it turns you against your own allies. This is a level 5 one-shot, heavy on puzzles and investigation with a deadly, fast-paced final showdown. Face a creature immune to all damage and conditions until you uncover the horrifying truth behind the research. Clear the module for 250 gp and a choice of uncommon magic items from the Guild Vault, such as a bag of holding or a deck of illusions.