"You enter the room. The door closes behind you with the sound of suction."
"Gruk light torch. Gruk don't like dark."
"As the torch ignites, an engraving becomes visible. It reads, 'Let not the light snuff out your life'. The walls are smooth and seamless."
"Probably built by vampires or something. Let's keep moving."
[2 minutes later]
"You all die of toxic smoke inhalation and asphyxiation. Reroll your characters."
"WHAT?!"
"Not my fault you used an open flame in an airtight room."