Wizard - School of Astrology

Level 3: Astrology Savant

Choose one Wizard Spell from the Astrology school, which must be no higher than level 2, and add it to your spellbook for free.
In addition, whenever you gain access to a new level of spell slots in this class, you can add one Wizard Spell from the Astrology School for free. The chosen spell must be of a level for which you have spell slots.

Level 3: Star-Touched

Most Astrology Spells are based on conditions which change depending on the current Star. Whenever a creature succeeds on a ST against your astrological spell effects, you may use your reaction and force it to reroll the ST die OR substract your charisma modifier to it. Whichever you choose, the creature must take the new roll.

Moreover, if a creature tries to spread one of your star conditions to one of your allies OR if they are caught in one of your areas of effect, and the ally fails the corresponding ST, you may use your reaction and let them roll the ST again AND add your charisma modifier to it, letting them take the higher number.

These features do not have a maximum total limit, but you may only use them once per creature per short or long rest. However, if you use any of these features and they fail to change the outcome, you may try to use them again on the same creature until it succeeds.

Level 6: Stellar Evocator

Whenever you deal Stellar Damage with any spell, you may add your charisma and intelligence modifier to the corresponding damage roll, putting your mind and soul to the task of delivering maximum damage output.
You can use this feature a number of times up to your Proficiency Bonus. Once per long rest, you may regain half (rounded-down) the expended uses in a short rest. And all expended uses are recovered in a long rest.
Additionally, if someone tries to counterspell one of your Astrology Spells, you may roll the Constitution ST with advantage and add your charisma modifier to the roll.

Level 10: Celestial Form

You've learned to channel the power of the stars into your own being. Choose one of the following main-star variations each time you complete a long rest, and you gain its corresponding benefits until your next long rest, or until you are incapacitated or dead:

• White Celestial Form: you are light and light is your weapon. You are immune to the blind and star-blind conditions, but not magical darkness blinding.
  Moreover, as a bonus action, you may choose to emit non-magical bright light in a 30 ft radius and dim light in 30 ft more for 1 minute. Any creature you choose who enters your bright light aura radius, is forced to make a Charisma ST against your spell save DC, and be star-blinded if it fails, up until it gets out of range. You can use this feature a number of times equal to your Charisma Modifier (minimum of 1) and all expended uses are regained on a long rest.

• Red Celestial Form: energy overflows through your veins and yearns to come out for the reaping. You may add your charisma modifier to the Attack Roll and Damage Roll of any spell of any school you desire.
  Furthermore, you can empower the attacks of your allies by sharing your stellar energy with them. As a bonus action, until the end of your next turn, any ally within 120 ft of you can add your charisma modifier to their Attack Rolls and do 1 additional Stellar Damage per attack. You can use this feature a number of times equal to your Charisma Modifier (minimum of 1) and all expended uses are regained on a long rest.

• Black Celestial Form: you master the only existing stellar-energy stronger and faster than the speed of light, magical darkness. You gain magical darkvision in a range of 60 ft but are not immune to blinding conditions.
  In addition, you may use your bonus action to clap your hands in a crackening thunder and release a wave of stellar darkness which consumes all life within. Using yourself as the center, any creature in a 20 ft radius circle, allies included, must make a Charisma ST against your spell save DC or be consumed by darkness, taking 5d8 necrotic damage on a failed save, or half as much on a succesful one. The area counts as magical darkness and stays in the same spot, lasting for 1 minute. You can use this feature a number of times equal to your Charisma Modifier (minimum of 1) and all expended uses are regained on a long rest.

Level 14: Stars Unbound

For any of your Astrological Spells and Cantrips, you may take control over the stardust that materializes them and change their Chromatic Variation, making you able to cast any Spell Variant of any Star Color without consequence and regardless of the Current Star Period of the Planet, all of which are recorded in each Spell's information page.

This feature proves your mastery over Astrology as an arcane discipline, and the cunning you've developed after identifying for many, many years, what makes each star special.