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 frost worm bites Keyleth, who casts Blight as payback and heals herself. Vax asks Pike for healing, then hits the visible worm.
DM: Uriel now goes, "I am beyond confident that all doubts in the capabilities of those I leave the city to, and more--" And it's at this point you start hearing bells going off around the city. Tops of walls in the distance. You recognize these. These are warning bells. At which point the crowd starts murmuring and getting nervous, and Uriel puts his hand out. "Please, please. I--"
Player: Can I use my Primeval Awareness to see if it's actually dragons close by?
DM: Okay. You begin to concentrate on that for the moment. Asum now steps up and says, "Everyone, if I might ask you to all quickly make your way to your respective homes. There is a small emergency we must attend to." At this point, you guys hear this (whoosh) sound and you turn around just in time to see what looks to be a large, larger than you've seen before, white dragon just slam into the side of Allura's tower in the distance. Claws clunk into the side, digging into the stonework, wings unfurled, it looks into the upper window of where her actual parlor is and peeks in for a second before just unleashing a blast of icy cold magical breath into the inside of the tower. You can see now, screams start tearing around you as the guards start getting their weapons ready. At which point, the dragon pulls its head back and looks about at everyone screaming, and pushes off the tower. As it does you see the stonework crack, and the top of Allura's tower shatter--
Player: Oh, my god!
DM: -- and then begin to collapse, smashing into the city streets around you. At which point, the dragon (wingbeats) and takes off again above you. At this point in time: utter chaos has been unleashed, and you can see now the guards are rushing Uriel off the table. You guys are there caught amongst this chaos. At this very moment, as the white dragon heads deeper into the city, you hear a loud impact that silences the chaotic air around you, as the wall that the stage is buttressed up against now has perched above it an enormous vision of death: a grinning ancient green dragon. Its wings are curled around its form as it looks down at the rest of you in the middle of this open space and goes, "Delicious cattle. Raishan enjoys the taste of fear."
Player: Raishan?
DM: At which point it leaps down onto the stage, crushing part of it. I would like you all to roll initiative.
