It's a fantasy role-playing game.

DM: You are Scanlan Shorthalt, a gnome bard . You are the member of the famous group of adventurers. Previously, Tiberius flies down the stairs into the middle of the hallway and casts Glacial Blast from both hands, at each entity. Vax and Jarett dodge out of the way, and the invisible creatures take the hit.
DM: It would if it wasn't immune. However, as you arc down, the ice blast comes through. You can see Vax manages to pull down to the ground and get out of the way in time. Jarett ducks out of the way and it blasts over, hitting both these entities. Ice crackles around both their forms, but then the forms shift out of it. That ends your turn right there. Comes back to Scanlan.
Player: Oh, where am I?
DM: You are right there. Just entered the room behind everybody else.
Player: Where does Percy do his tinkering?
DM: Over here.
Player: Because I can't see what's going on down there.
DM: No, you just see, currently, these three down the hallway. You can just see Tiberius blast a bunch of ice, arc in the air.
Player: Okay, so I know there's shit going on down there, but I can't really see what. So I would probably just Dimension Door into the tinkering room, because that's where I assume Percy is. And then I see what's going on, and nobody's there. Do I have line-of-sight on anybody?
DM: Currently, you see Percy through this doorway right there.
Player: Okay. Well, then. I can move also, can't I?
DM: Yeah, Dimension Door is your action.
