Way of the Tamaranean Star

Warlords of Okaara have trained you in the art of martial fighting, while Psions have brought your true, solar-bonded powers to life. You are a Tamarian with radiant powers that bolster your attacks and energies, using your Ki and emotions to help your planet and friends.

Solar Darts

Starting at 3rd level you can take a special attack action. This attack is considered a ranged spell attack with a range of 100 feet. You are proficencient with it, your attack and damage rolls use your Wisdom ability modifier and the damage die is the same of the Martial Arts table in the Class Features Table.

When you use your attack action to deal one or more, from level 5, Solar Darts, you can spend 1 Ki point to use another Solar Dart as a bonus action. The damage type of Solar Darts is radiant.

For Fun This subclass is made just to fit in Starfire from the DC comics univers, it takes inspiration from Sun Soul in Xanathar's Guide to Everything and is not thought to be perfectly balanced. Anyway, if you want to balance it you can remember that Starfire powers rely on the sun, so you can make its first feature with the following nerf: when not under the direct light of sun, Solar Darts attacks are made with disadvantage.

Radiant Beam

When you reach level 6 you can channel your Ki, emotions and power in one single beam, usually from your hands or your eyes. Spen You can channel solar energy in a beam against a creature within 100 feet. That creatures must succed on a Dextery Saving Throw against your spellcasting ability modifier or take 2d of your Martial Die ratiant damage, half on a success. You can maintain concentration, even if you change target of the feature, to empower your beam with every round. For every round after 1st its damage increases by one die, but you have to spend 1 Ki point at the start of every round you maintain this effect.

Finally, if the target fails the saving throw you can push it 5 feet directly away from you.

Sun Shield

Since 11th level you can use your Ki to shred yourself in a radiant shield. You can spend 3 Ki points as an action to surround you with solar energy. Doing so increase your Armor Class by an amount equal to your Proficency bonus.

Additionaly, every creature within 5 feet from you takes radiant and fire damage equale to your Wisdom ability score modifier. This effect lasts 1 minute.

Solar Nova

At 17th level you have understood your true potential, and gathered enough solar power to explode in a single, powerful and overwhelming nova.

As an action you can spend 5 Ki points to force every creature within 30 feet from you to make a Dextery Saving Throw. On a failed save they take 8d6 fire damage and 8d6 radiant damage, or half the damage on a success.

You can choose any number of creature to automatically succed the Saving Throw, and you regain the use of this feature after a long rest or a short rest directly under the light of the sun.

Credit: Kyounghwan Kim