Gith

From Mordenkainen's Tome of Foes, page 96; and Unearthed Arcana: Eladrin and Gith.

Traits
Your character shares the following traits with other gith.


 * Ability Score Increase: Your Intelligence score increases by 1.
 * Age: Gith reach adulthood in their late teens and live for about a century.
 * Size: Gith are taller and leaner than humans, with most a slender 6 feet in height.
 * Speed: Your base walking speed is 30 feet.
 * Languages: You can speak, read, and write Common and Gith.
 * Subrace: There are two kinds of gith, githyanki and githzerai. Choose one of these subraces.

Githyanki

 * Ability Score Improvement: Your Strength score increases by 2.
 * Alignment: Githyanki tend toward lawful evil. They are aggressive and arrogant, and they remain the faithful servants of their lich-queen, Vlaakith. Renegade githyanki tend toward chaos.
 * Size: Your height is 5'0" with a modifier of +2d12. Your weight is 100 lbs. with a modifier of +(height roll) x 2d4.
 * Decadent Mastery: You learn one language of your choice, and you are proficient with one skill or tool of your choice. In the timeless city of Tu'narath, githyanki have bountiful time to master odd bits of knowledge.
 * Martial Prodigy: You are proficient with light and medium armor and with shortswords, longswords, and greatswords.
 * Githyanki Psionics: You know the Mage Hand cantrip, and the hand is invisible when you cast the cantrip with this trait.
 * When you reach 3rd level, you can cast Jump once with this trait, and you regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the Misty Step spell once with this trait, and you regain the ability to do so when you finish a long rest.
 * Intelligence is your spellcasting ability for these spells. When you cast them with this trait, they don't require components.

Githzerai

 * Ability Score Improvement: Your Wisdom score increases by 2.
 * Alignment: Githzerai tend toward lawful neutral. Their rigorous training in psychic abilities requires an implacable mental discipline.
 * Size: Your height is 4'11" with a modifier of +2d12. Your weight is 90 lbs. with a modifier of +(height roll) x 1d4.
 * Mental Discipline: You have advantage on saving throws against the charmed and frightened conditions. Under the tutelage of monastic masters, githzerai learn to govern their own minds.
 * Githzerai Psionics: You know the Mage Hand cantrip, and the hand is invisible when you cast the cantrip with this trait.
 * When you reach 3rd level, you can cast Shield once with this trait, and you regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the Detect Thoughts spell once with this trait, and you regain the ability to do so when you finish a long rest.
 * Wisdom is your spellcasting ability for these spells. When you cast them with this trait, they don't require components.

There is also a version of githzerai released in Unearthed Arcana: Eladrin and Gith.

Consult your DM before using this version. It is usually considered unofficial and invalid due to updated material.


 * Monastic Training: You gain a +1 bonus to AC while you aren't wearing medium or heavy armor and aren't using a shield. All githzerai receive basic training from monks, and the monks among them are unmatched in their defensive abilities.
 * Githzerai Psionics: You know the Mage Hand cantrip. When you reach 3rd level, you can cast Shield once with this trait, and you regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the Detect Thoughts spell once with this trait, and you regain the ability to do so when you finish a long rest.
 * Wisdom is your spellcasting ability for these spells. You can cast all of them without components.