Armor Class 18 ({@item plate armor|phb})
Hit Points 180 (24d8 + 72)
Speed 30 ft.
Saving Throws CON +7, INT +7, WIS +6
Skills Intimidation +7, Perception +6
Senses passive Perception 16
Languages Gith
Challenge 12
Rally the Troops. As a bonus action, the githyanki can magically end the charmed and frightened conditions on itself and each creature of its choice that it can see within 30 feet of it.
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.
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.
Mordenkainen's Tome of Foes, p. 205