Multiattack. The githyanki makes three Greatsword attacks.

Greatsword. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage plus 17 (5d6) psychic damage.

Astral Step (Recharge 4–6). The githyanki teleports, along with any equipment it is wearing or carrying, up to 30 feet to an unoccupied space it can see.

Rally the Troops. The githyanki magically ends the charmed and frightened conditions on itself and each creature of its choice that it can see within 30 feet of it.

Parry. The githyanki adds 4 to its AC against one melee attack that would hit it. To do so, the githyanki must see the attacker and be wielding a melee weapon.