Path of the Ethereum Barbarian Subclass

Prerequisit: Must be Etherborn (Race)
Ether Surge Starting at 3rd level you gain the ability to pass into the ethereal plane to avoid damage. You gain resistance to force damage.

You can use your Ethereal Existence a number of times equal to your Constitution modifier. You regain all expended uses on a long rest.

When using your Ethereal Existence to evade all damage on an attack you can make an

retaliatory attack at advantage. The damage you deal is force damage and cannot be negated by resistance.
Soul Slash Starting at 6th level your weapon attack are considered magical for the purpose of overcoming resistances. You have gained the ability to attack a creatures soul instead of its material body. Your attacks deal extra force damage equal to your proficiency bonus.
Born of Ethereum Starting at 10th level you can use your action to sense ethereal energy around you. You focus all your energy and expand your senses, all enemies, objects or apperations within 60 feet are revealed for 1 minute. You regain this ability on a long rest.
Overwhelming Force Starting at 14th level you have become so proficient at manipulating the ethereal energy around you all your attacks deal force damage. When dealing force damage to a creature as part of an attack action you can decide to roll a D20. On a 9 or higher you can make another attack as part of that same action. You can do this three times, all expended uses are regained on a long rest.