Innate Spellcasting (Psionics).

The githyanki's innate spellcasting ability is Intelligence (spell save DC 13, +5 to hit with spell attacks). It can innately cast the following spells, requiring no components:

At will: mage hand (the hand is invisible)
3/day each: jump, misty step, nondetection (self only), tongues
1/day each: plane shift, telekinesis

Actions

Multiattack.

The githyanki makes two silver greatsword attacks.

Silver Greatsword.

Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage plus 10 (3d6) psychic damage. This is a magic weapon attack. On a critical hit against a target in an astral body (as with the astral projection spell), the githyanki can cut the silvery cord that tethers the target to its material body, instead of dealing damage.

Githyanki Knight