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, They arrive without too much trouble at a point directly above where you senses the sword. Keyleth glides through the earth as an elemental, but is unable to find the sword, so you decides to look for it by dousing herself in Oil of Etherealness.
DM: Your movement speed, at double movement, would be 60 with the double dash. You're moving 30 feet per round because when you're moving through the Ethereal Plane through solid objects and matter, it does slow you to half speed.
Player: Can I sense Keyleth at all? I can't see her, right?
DM: You can't see her, you can't sense her, but you do sense the sword. You sense the direction still, because Locate Object is still in effect, and you're drifting down, down, down. About a hundred feet. 150 feet. And then as you head down to that point, you suddenly emerge and you can see a small cavern, maybe ten feet in diameter. Looks like there's a bit of rubble. Looks like there may have been a path that led to here that long crumbled and was either intentionally collapsed or naturally collapsed by the movement of the titan. And as you come into this ten-foot little cavern space, half of the floor is coated in this brackish green fluid, and the other half is solid rock.
Player: Okay. I keep going towards the sword.
DM: Okay. It then takes you at a slight angle down into the liquid, and now you can see the tunnel continues downward. There's a small basin that changes shape as you go down into this murky greenish fluid, down where there's no light. It is normally pitch black here, but the etherealness allows you to take a little bit of the space in. Looking around, you can see that there is a thick residue that is gathered along the edges, and there at the bottom, you can sense, though you cannot see it because it is actually a few inches beneath the muck, you assume, the sword.
Player: I can't touch it.
DM: Correct.
Player: But I know where it is. Can I come up into the cavern, and you said there was rock outcropping that I can stand on? Can I get this shit off of me, the oil off of me, or am I stuck as an ethereal form?
DM: This is going to be an interesting question.
