Ability Score Increase. Your Intelligence and Wisdom score increases by 1.

Age. Your consciousness awoke determined and competent but remembering when and how it occured is a feint image at best. Ethereals live indefinitely.

Alignment. After years of observing multiple kingdoms evolve, fight and rebuild, Ethereals tend to attach themselves to what they've noticed works for a society. Their beliefs and ideals are based on results and are factual, focusing more so on what's best for society in a greater sense and less on individual circumstances.

Size. All Ethereals are a perfect 6'6". Your size is Medium.

Speed. Your base Walking speed is 30 feet. Your base Flying speed is 20 ft.

Barely Tangible. Your Constitution score decreases by 2.

Observant. You gain a proficiency in Insight.

Inorganic. You are immune to Poison and Disease, but have disadvantage to Acid based attacks.

Cycling Consciousness. Ethereals do not need to sleep, they merely need 4 hours of dormant relaxation time where they are still very much aware of their surroundings. They gain the same benefits from this as an 8 hour rest.

Languages. You can read, speak and write Common and Celestial.

Subrace. With determined and powerful personalities comes a definitive path and for the Ethereal that means becoming either The Blade Dancer, The Golem or The Connection.

To be Ethereal is to be Immortal. However the consciousness you have on this Plane is your own and that may Assimilate should your Body fail you.

In your Gaseous Form you are vulnerable, however bonding with particular materials makes you a Body that holds you to this Plane. As your form bonds with your chosen vessel, you thread with it to form an almost organic structure, creating a form that adds to your constitution based on it's weight.

Weight:

1-15 lbs. - +1 Constitution Modifier.

16-40 lbs. - +2 Constitution Modifier. -1 Dexterity.

40 lbs. +  - +3 Constitution Modifier. -1 Dexterity, Disadvantage on Dexterity Checks.

Damage to your Body can occur and should be properly maintained as a result. The DM will determine should an event or significant attack done to you will cause either Minor Damage or Major Damage to your Body.

At your Pure Form you may last up to 2 hours out of Combat or 6 turns in Combat.

With Minor Damage to Body - 4 hours out of Combat or 8 turns in Combat.

With Major Damage to Body - 3 hours out of Combat or 6 turns in Combat.

When a Strong Wind occurs, you lose 20 minutes of your Form Time, or 1 turn in Combat.

If your Hit Points ever reach zero, you are not dead, merely unconscious. You may be revived by mending, repairing or healing spells to hit points equal to you Constitution Modifier + Proficiency + Level.

When you become unconscious, your current Body receives Minor Damage at the least. The timer being 5 turns (or 2 hours out of combat) before you are Assimilated.

Lacking a physical form you require a constant Body to hold your form, else you Assimilate into the Ether, become apart of something greater. This can be as simple as a blanket or rolls of cloth, or a suit of armor that you march around in. You may willingly leave your Body to become a Gaseous Form once per rest. In this form you may move through small cracks, holes with an advantage to Stealth. You may lift things no heavier than 5 lbs. You are cannot maintain physical harm in this form.

If you are in your Gaseous Form for any longer than 2 hours, you are Assimilated, consciousness leaving forever. Should a strong wind occur, it immediately takes 30 minutes off your Gaseous Form time.