Ethereal Step

Briefly allows the caster to step into the border regions of the Ethereal Plane, in the area where it overlaps with your current plane as if under a very brief effect of the Etherealness spell. While on this plane, you can use your movement (up to 30 feet) to move to an unoccupied space that you can see in any direction. If you move up or down, every foot of movement costs an extra foot. You can see and hear the plane you originated from, but everything there looks grey, and you can't see anything more than 60 feet 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, or you stop moving, 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 twice the number of feet 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. Additionally, as this spell alters the plane with which your movement takes place in, this spell has no effect if you cast it after you’ve moved this round, you are under the influence of the restrained condition, or otherwise have a speed of 0. Finally, as this spell is not a teleportation, casting this spell and then beginning your movement does not avoid attacks of opportunity against you if you use it to move out of an enemy’s reach until you have moved at least 5 feet in any direction.