The School of the Ether is a branch of the School of Conjuration focused on the Ethereal Plane and its connection to other planes. A student of the ether is able to see and enter the Ethereal Plane, teleport across vast distances, and open gates within and to other planes of existence. As mastery grows, a student of this school is able to cut through and navigate the Ethereal Plane with great aptitude.

Shift

Starting at 2nd level when you choose this school, you can use a Bonus Action to briefly surround yourself with mist, then teleport up to 30 feet to an unoccupied space that you can see. You can use this feature a number of times equal to your Proficiency Bonus, after which you must complete a long rest before you can use it again.

Ethereal Perception

Additionally at 2nd level, you can use your Action to project into the border regions of the Ethereal plane, into the area where it overlaps with your current plane. For one minute, you can see into the Ethereal plane within 60 feet of you. Once you use this feature you must finish a short or long rest before you can use it again. You are unable to use this feature if the plane you are currently on does not border the Ethereal plane.

Ethereal Ingress

Starting at 6th level, you are able to traverse, cut, and manipulate your way through the ether, enabling you to empower your spells. When you use a spell slot to cast a Conjuration spell of 1st level or higher with a range of at least 5 feet, you may use an additional 2nd level spell slot to triple the spell’s range.

Ether Step

Starting at 10th level, you are able to quickly step into the Border Ethereal on command. When a hostile creature that you can see attempts to hit you with an attack, you can use your Reaction to increase your AC by 2 until the end of your next turn. Once you use this feature, you can’t use it again until you finish a rest or cast a teleportation spell of 1st level or higher.

Dual Natured

At 14th level, your mastery of the ether allows you to continually persist in the border regions of the Ethereal Plane. You perpetually coexist on the plane you are currently on as well as the Ethereal plane, provided you are not Unconscious. You can always perceive on either of these planes with all your senses. On your turn, you may forgo your movement to teleport to an unoccupied space you can see on your current plane within 40 feet of you. 

You are unable to use this feature if the plane you are currently on does not border the Ethereal plane.

Additionally, when you use your Ethereal Perception feature while you are on a plane that borders the Ethereal plane, you can use that feature to instead shift to the Ethereal plane (as per the Plane Shift spell, targeting only yourself). Once before you leave the Ethereal plane, you can use your Action to return to the plane you shifted from.