It's a fantasy role-playing game.

DM: You are Vex Vex'ahlia, a half-elf ranger . You are the member of the famous group of adventurers. Previously, The group gathered together, rode onto a magically elevated skyship, and traversing the ocean, carrying the Horn of Orcus within this holy container. They found themselves, over the ocean, suddenly attacked by a band of what seemed to be wyvern- and griffon-riding bandits.
DM: He gives a look to the rest of the group here, and you can see there's a noticeable bead of sweat he kind of wipes off his forehead. "I just needed to confirm that this was not some haphazardly constructed fake or some other artifact mistaken for such a horn, but we indeed have within our presence one of the Horns of Orcus, and this does not bode well."
Player: (whistles)
DM: "Thankfully--"
Player: Are you guys-- oh, sorry.
DM: "No, please. What do you want to say?"
Player: I was just wondering. You've had one of these before, yes?
DM: "No, but we know that these exist. A few of us do; the knowledge itself has been lost to time intentionally. It was brought to my attention, and through discussions with the Council that sent you on this journey, that this would be the safest place to seal such an artifact, and amongst all our other options, as of this time, I see no other choice. So. What's been proposed. Allow me to explain to you the plan. One of our most divine relics of our most beloved protector Bahamut was kept deep beneath this temple, within the mountain we rest against. The Star of Exaltation, a crystal born from the tear Bahamut shed for the sacrifices his first devoted made in the Great War of the Beginnings, the Dawn War. This item was unfortunately lost nearly 300 years ago, giving the last of its power to protect this very Vasselheim. The intervention it brought from our great deity expended and left the artifact destroyed. Since the chamber that held this Star, a blessed and ever-watched nexus beneath the gaze of the Great Platinum Dragon Himself, has gone empty, we've tended to it. We've kept it fairly well-watched and in the state it was originally constructed for. And we think no greater location to seal such a deeply-rooted evil exists within our spheres of influence or any other. Unfortunately, the last time the chamber was cleansed and prepared was some 15 years ago. Our curate tasked one of our own Scalebearers--" And he looks over towards Yonn, who sheepishly backs away. "-- was tasked with preparing it for your arrival, and the artifact's, and it was found that the lower chambers have been infested with some manner of foul subterranean spider creature."
