Star Forger

This Sub Class is based on the character Aurelion Sol from League of Legends.(Also this is more of a concept rather than a finished homebrew so the balancing may be off)

Domain Spells

1st Chromatic Orb, Magic Missle
3rd Dragons Breath, Vortex Warp
5th Intellect Fortress, Melf Minute Meteors
7th Gravity Sinkhole, Sickening Radiance
9th Destructive Wave, Summon Draconic Spirit

Behold

You gain knowledge of the stars and the prophecies they foretell

Starting at 1st Level Once per night you may cast Augury by looking at the night time Constellations

Star Forging(Channel Divinity)

You gain the ability to forge miniature celestial bodies that deal damage to those who touch them

Starting at 2nd Level as an Action you may expend a Channel Divinity to Create One of the Following

Star/Sun Create a 5ft Star that lasts for 1 minute any creature who starts their turn adjacent to it must make a Constitution Save or take 1d10+Wisdom Fire Damage and is blinded, This Damage doubles every 5 Levels
Black Hole Create a 5ft Black Hole that lasts for  3 rounds anyone who starts their turn within 5ft takes 1d10+Wisdom Force Damage this range increases by 5ft every round before dissipating, This Damage doubles every 5 Levels
Nebula Create a 30ft long line of Nebula that lasts for 1 minute anyone who starts their turn in it makes a Dexterity Save or take 2d6 Radiant Damage, This Damage doubles every 5 Levels

Cosmic Creator

You can absorb the celestial energy that falls from your body after being injured

Starting at 6th Level As a reaction you can gain stacks of Star Dust equal to the damage taken this turn, You can convert 20 Star Dust into an Extra Channel Divinity

Astral Flight

Starting at 8th Level Gain a Flight Speed Equal to your Move Speed Every 30ft Traveled gain 10 Stardust

The Skies Descent

You can channel the cosmic energy from the sky itself

Starting at 17th Level As an action Deal 20d10 Radiant Damage in a 20ft Radius Sphere and Creatures within 200ft take 1d10 Radiant Damage to all creatures who succeed a Saving Throw of their choice on a success they take half damage, You may Convert 10 Star Dust into 1 Point of Damage for The Skies Decend, You cannot use this feature again until you long rest