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, Grog, Vax, and Percy move to tackle the three planars in the air. Two fall, but the third manages to grab on to you's dragon form as she flies up.
DM: And a 12. So two of them. You shoot two of the wings out of the way and they plummet down, and you manage to coast past two of them in your dragon form. One of them does manage to grab onto you and get its hands, big strong hands on the back of your head and try and steer you to the side.
Player: Can I cast Frightful Presence?
DM: We'll get to that in just a moment. It's going to attempt to-- no. It tries to pull against you, but even with its extremely strong planar strength it cannot guide you away from the path, and you push past. You are now outside of the chamber in the base of the tower, just flying upward. You can go ahead and use your Frightful Presence. All right, so that's your action.
Player: All of the creatures-- no, of my choosing, so all the bad-- not bad guys, but you know, people we're fighting.
DM: As you roar loudly and it echoes, filling the entirety of the chamber, the music of the surroundings now merging and shifting with this horrible dragon roar. None of these angelic entities seem even remotely affected by it.
Player: Oh, really? They don't even have to make a wisdom saving throw?
DM: They are immune to fear. Or being frightened, sorry.
Player: That makes sense.
DM: But do you continue flying upward? Okay! So you finish your spell, you take your shots, Keyleth, Pike, anything?
