Armor Class 17 ({@item half plate armor|phb})
Hit Points 123 (19d8 + 38)
Speed 30 ft.
Saving Throws CON +6, INT +7, WIS +6
Skills Insight +6, Perception +6, Stealth +6
Senses passive Perception 16
Languages Gith
Challenge 10
War Magic. When the githyanki uses its action to cast a spell, it can make one weapon attack as a bonus action.
Multiattack. The githyanki makes two longsword attacks.
Longsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage plus 18 (4d8) psychic damage, or 8 (1d10 + 3) slashing damage plus 18 (4d8) psychic damage if used with two hands.
Mordenkainen's Tome of Foes, p. 205