Possessed Vigor. Zaynah doesn’t require air, food, drink, or sleep.

Magic Resistance. Zaynah has advantage on saving throws against spells and other magical effects.

Unearthly Stare. Any creature within 30 feet who can see Zaynah must make a Charisma saving throw (DC 18). On a failure, the creature is frightened. They may retake this saving throw at the end of each of their turns. On a success, they are no longer frightened and become immune to this effect for the next month.

Spellcasting. Zaynah is a 19th-level spell caster. Their spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). It has the following warlock spells prepared:
1st level (4 slots): charm person, hellish rebuke

2nd level (3 slots): ray of enfeeblement, darkness

3rd level (3 slots): fear, counterspell

4th level (3 slots): banishment, dimension door

5th level (2 slots): hold monster

Multiattack. Zaynah makes 3 attacks with the Sclerade

Sclerade. Melee Weapon Attack: +11 to hit, reach 5 ft., 1 target. Hit: 12 (2d6 + 5) slashing damage, plus 18 (4d8) necrotic damage. 

Thousand Eyes (1/day). The many eyes across Zaynah's armour focus on one creature they can see within 120 feet of them. This creature, as well as any others within 10 feet of them, must make a DC 18 Dexterity saving throw. A thousand small points of energy within that area explode with orange energy, spreading around corners. A creature takes 35 (10d6) fire damage and 35 (10d6) necrotic damage on a failed save, or half as much damage on a successful one.

Parry. Zaynah adds 6 to their AC against one melee attack that would hit them. To do so, Zaynah must see the attacker and be wielding a melee weapon.