(Tell me if this subclass is too over or under powered, and I will try to make adjustments)

 

Planar Blessing

At first level, choose one of the options listed below, as the mystery of the realms changes your appearance.

-One of your arms turns a crystalline blue, and ethereal wisps wrap around it. Can be used as a spellcasting focus, and when used this way gives +1 to spell attack damage.

-Your entire eye turns a bright blue, creating dim light in a 10ft radius.

-Your body becomes semi-translucent, +1 to stealth checks.

-Your body flashes in and out of the realms. After defeating a monster, roll a d6. The rolled body part disappears for a second and returns, strengthened.

1-Arm, +1 to next melee attack

2-Leg, +5 to movement speed next turn

3-Chest, +1 temporary hit point, lasts for 3 turns

4-Head, +1 to next intelligence check

5-6- Nothing happens

During a long rest, you may expend 2 sorcery points to change this feature.

 

Astro-ethereal contro

Starting at 6th level, you can expend sorcery points to bend Astro-ethereal energy to your will.

5 points-Ethereal slam. Choose a target within 30 feet of you. They are hit with a wave of ethereal force, taking 1d8 (per 6 levels) force damage and being pushed back 10 feet or until they hit a wall. If they hit a wall, they take an extra 1d6 force damage. Then they make a DC 10 constitution saving throw or are banished to the ethereal plane for one turn, re-appearing in the nearest unoccupied space from where they left.

7 points-Ethereal movement. You vanish into the ethereal plane for 2 turns, or until you decide to come back. you can move, and reappear in the nearest unoccupied space that is parallel to your ethereal position in the material plane.

Astro-ethereal Navigatio

At 14th level, you are adept at movement through the Ethereal and Astral planes.

-You can no longer be delayed by more than 5 days due to Astral or Psychic storms.

-You and up to 2 other creatures you designate no longer have silver cords in the Astral plane

-You can spend 12 sorcery points to change the color and destination of any Astral pool or Ethereal curtain for 24 hours.

Astro-ethereal Command

At 18th level, you have even more control over the two planes. 

-You can fade in and out of the Ethereal plane at will up to 6 times per long rest. (Each use is a one-way trip)

-Your Astro-ethereal control feature gains new abilities

10 sorcery points: all creatures within 50ft of you suffer the effects of psychic wind

20 sorcery points- You cast Gate, Plane Shift, or Arcane Gate with out expending a spell slot.

2 sorcery points- You cast Feather Fall on yourself, however you diaper into the Ethereal plane for the duration after falling more than 5 feet, and reappear on the ground instantly.

-Upon re-entering a material plane, all spell slots expended in the Astral or Ethereal planes are re-imbursed.

-You can cast teleport 1 per short rest without expending a spell slot.