It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, A couple of hours later, the ship comes upon an unnatural-looking fog bank in the ocean. Adella tries to veer around it.
DM: So you're-- we'll say you're up over, you kind of shimmy your way along the edge of the sail, and you're looking right down below him.
Player: Okay.
DM: This guy right there.
Player: So, advantage on this.
DM: The guy closest to Grog, or the guy who's alone right there?
Player: The one that you are touching right now.
DM: Okay, gotcha.
Player: Yeah. So that is a 32 to hit.
DM: That will hit.
Player: So this is Assassinate, it's an auto-crit--
DM: Did you roll at disadvantage because of the fog cloud?
Player: Well, no, but I'm at advantage because of Assassinate, so the first roll was a 19.
DM: Yeah, so you're fine.
