It's a fantasy role-playing game.

DM: You are Tiberius Stormwind, a dragonborn sorcerer . You are the member of the famous group of adventurers. Previously, Grog rages and takes two big swings at the door, cleaving it in two, and moves into the room. Vax pulls free of the mind flayer's grasp and stabs it with his Dagger of Venom, killing it.
DM: All right. That brings us to Clarota, who's currently stunned and fails save, Clarota's still stunned. Tiberius.
Player: I look through the door.
DM: Look through the door.
Player: What's going on in here? Are there any enemies I can see?
DM: You can see over here, barely. It's very dark in the far corner, you can see just the shape of some humanoid there.
Player: Oh. Okay, is he--
DM: What are you doing, Tiberius?
Player: How tall is the thing?
DM: From what you can see, it's maybe roughly six, seven feet. Grog's blocking most of it.
Player: No, like, we're in a bunker, right?
DM: Right now, you're in this giant great hall with giant tables and stools everywhere.
Player: And the ceiling is--
DM: You can't see the ceiling right now, there's no light.
Player: Oh.
DM: The room is near pitch-black, like there's just very little light in there currently.
Player: I will waltz in behind Grog.
DM: All right.
Player: I cast Light.
DM: Okay. The room all of a sudden bursts into view, you can now see the walls, the ceiling-- it's a smooth stone room. There is a large chandelier currently hanging from the top of the ceiling. It's about 25 feet up to the ceiling in this current room.
