Door of Dooring
Description: A heavy metal (❌🤘) door, without any inscription or mysterious entity guarding it, in a completely empty room. Oh and also without a handle or a key hole. The players can’t sense any sort of magic coming from it.
Functionality: It’s a one way door. The players must find a way to open it from the inside, like using daggers in the space between the door and the wall to pull it or with magic.
Inspiration: …I closed myself in a walk-in-freezer accidentally. For 30 minutes, which is probably less than how much time your players are gonna spend trying to understand what’s the deal with this door.