1 minute/mana
As two actions, you step into the border regions of the Ethereal Plane, in the area where it overlaps with your current plane. You remain in the Border Ethereal for the duration or until you dismiss the spell on your turn (no action required). During this time, you can see and hear the plane you originated from, but everything there looks gray, and you can’t see anything more than 10 meters away.
While on the Ethereal Plane, you can only affect and be affected by other creatures on that plane. Creatures that aren’t on the Ethereal Plane can’t perceive you and can’t interact with you, unless a special ability or magic has given them the ability to do so.
You ignore all objects and effects that aren’t on the Ethereal Plane, allowing you to move through objects you perceive on the plane you originated from.
When the spell ends, you immediately return to the plane you originated from in the spot you currently occupy. If you occupy the same spot as a solid object or creature when this happens, you are immediately shunted to the nearest unoccupied space that you can occupy and take force damage equal to 10 for every meter you are moved.
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.
Augment
You can target five additional willing creatures for each additional mana expended. The creatures must be within 5 meters of you when you cast the spell.
You can expend 1 additional mana to cast the spell as a reaction, which you use when you are hit by an attack or missed by 4 or less. The attacker must make an additional roll and use the worst result and the duration changes to the end of your next turn.
You can expend 1 additional mana to be able to move in any direction. If you move up or down, the distance is halved.
Continuous. You can expend 1 additional mana to change the duration to 1 hour/mana.