It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, In the morning, while everyone else is taking breakfast, Pike checks the front door and finds about 20 skeletons waiting outside. She and Grog charge out to handle them.
DM: All right, so at the beginning of this initiation, with the orb now flaring this pale gray-white and Delilah Briarwood standing there at the top of the ziggurat, staring down and focusing on the group of intruders that have just rushed in. Keyleth, it's your turn.
Player: Oh god. Okay. I am going to, under the cult hood that I have, transform my face with Alter Self into Sylas Briarwood.
DM: Okay.
Player: Her husband. Her dead husband. I'm going to have his face, and I'm going to walk forward and say, Delilah. Don't. It is me.
DM: Make a deception check.
Player: Deception?
DM: So as you step forward into the chamber.
