[RPG] Can you become Ethereal in the Outer Planes


I am playing D&D 5th edition. While reading the DMG, on page 44, it says:

The Inner Planes form a wheel around the Material Plane, enveloped in the Ethereal Plane.

Using the Great Wheel Cosmology, does this mean that the Ethereal Plane does not exist around the Outer Realms?
Could one cast etherealness or use "Oil of Etherealness" in the Outer Planes?

I would also be curious if other spells would be affected, but in the interest of specificity, I am just asking about etherealness.

Best Answer

The Etherealness spell states, in part:

This spell has no effect if you cast it while you are on the Ethereal Plane or a plane that doesn't border it, such as one of the Outer Planes.

So no, the Outer Planes don't border the Ethereal, and furthermore the Etherealness spell has no effect when used there.