Character Crunch: Sorcerer: The Alien

A sorcerer gets their arcane power from their lineage. Some get their power from dragon's blood or fey marriage. Others get their powers from celestial ancestry or elemental entanglement. The Alien Sorceror gets their magical heritage from beings from beyond the known space. Perhaps their ancestor was a sentient planetoid or star, perhaps they are the last member of an alien race that crash-landed on this planet long ago or perhaps they were gifted their power from a traveler who the helped get home.

Alien sorcerors are filled with starlight and their abilities reflect this power.

Star Child

At 1st level, you gain your guardian star. The star is about 3 inches in diameter and orbits your body with a small mote of dust behind it. You can summon or dismiss your star as a free action. You can command the star, as a free action, to move. It has a movement speed of 60 feet and can move up to 300 feet away. You can command it, as a free action, to shed bright light in a 30-foot radius and dim light for an additional 30 feet. As a bonus action you can command it to streak towards one creature or object within 150 feet of you. When you do so, make a ranged spell attack. On a hit, the target takes 1d8 radiant damage. Whenever you hit, the star is dismissed. After hitting a number of targets equal to your charisma, the star cannot be summoned again until you finish a long rest.

The damage increases to 2d8 at 5th level, the damage increases to 3d8 at 11th level, and the damage increases to 4d8 17th level. The range you can command it to strike increases to 300 feet of you at 11th level.

Also, as a reaction, which you take when you are hit by an attack or targeted by the magic missile spell, you can cause your guardian star to explode into a barrier. When you do so, it is dismissed and until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack, and you take no damage from the spell magic missile. When used this way, you must take an action to summon your star again.

Alien Origin
 
Starting at 6th level, it becomes clearer that your lineage is from beyond the stars. You do not need to breathe air, you can survive indefinitely in a vacuum, and you gain resistance to cold, fire and radiant damage.

Galactic Body

Starting at 14th level, you can use a bonus action to summon your own gravitational forces that manifest as an aura of swirling energy. While the aura is present, you gain a flight speed of 30 feet and you cannot fall prone.

The aura lasts until you're incapacitated, you die, or you dismiss your aura as a bonus action.

Cosmic Power

Starting at 18th level, you learn to tap into the powerful cosmic energy and can use it to repel enemies that would harm you. You can use a bonus action you spend 5 sorcery points to begin to glow brightly and radiate deadly energy on an up to 30-foot radius centered on you While the aura is active, you shed bright light in a 30-foot radius and dim light for an additional 30 feet, and if a creature moves into the affected light for the first time on a turn or starts its turn there, that creature must succeed on a Constitution saving throw or suffer one level of exhaustion and emits a dim alien light in a 5-foot radius. This light makes it impossible for a creature to benefit from being invisible. The light and any levels of exhaustion caused by this spell go away when you end the aura.

The aura lasts until you're incapacitated, you die, or you dismiss your aura as a bonus action.