It's a fantasy role-playing game.

DM: You are Percival de Rolo, a human gunslinger . You are the member of the famous group of adventurers. Previously, Stretching away from them are the remains of an ancient city, with a massive obsidian spire at its center. Above them, Vex notices a faint strand of bluish-purple light stretching from the orb, where they emerged, to the very top of the tower, and from the tower down to two other orbs.
DM: You have not seen anything like these before. Black as night against the gray sky. From this distance, you make out no details in their bodies. It's almost like a moving shadow above you. Wherever light would hit to give you some sense of structure, it's just absence, void. It's just a flying shadow.
Player: Are there any buildings that have enough structure to them where it feels like there might be things inside that have been relatively unmolested at this point?
DM: Possibly. Make a perception check.
Player: 12.
DM: 12. I mean, there are some buildings that look like they have some structure, and the further into the city you get, the more you see that this becomes a little less destroyed. But you begin to see some figures moving that are not armored undead, not zombies, and not any of these quick-moving creatures. You see three figures walking back towards the orb where you guys came from in the same black cult robes, hoods off. They would appear to be human.
Player: But they're cultists.
DM: But they're cultists.
