legendary resistance (3/day). if Vlaakith fails a saving throw, she can choose to succeed instead.

magical weapons. Vlaakith's weapon attacks are magical and can be considered admantine and mithral.

spellcasting. Vlaakith is a 20st-level spellcaster (spell save DC 24, +14 to hit with spell attacks). she has the following wizard spells prepared:

Cantrips (at will): blade ward, prestidigitation, ray of frost, green-flame blade

1st level (4 slots): detect magic, burning hands, shield, thunderwave

2nd level (3 slots): acid arrow, detect thoughts, see invisibility, mirror image

3rd level (3 slots): counterspell, dispel magic, fireball, cause fear

4th level (3 slots): fire shield, dimension door, banishment, mordenkainen's faithful hound 

5th level (3 slots): cloudkill, scrying

6th level (2 slots): disintegrate, globe of invulnerability

7th level (2 slots): prismatic spray, delayed blast fireball

8th level (2 slots): mighty fortress, power word stun

9th level (1 slot): power word kill, gate, imprisonment 

innate spellcasting (psionics).  Vlaakith's innate spellcasting modifier is intelligence (spell save DC 24,  +14 to hit with spell attacks). she can innately cast the following spells, requiring no material componenents: 

at will: mage hand,  jump

3/day:  misty step, nondetection, tongues, telekinesis  

2/day: plane shift

1/day: etherealness

multiattack. Vlaakith makes three attacks. alternatively, she can also use 2 attacks to cast a spell of 4th level or lower.

platinum greatsword. Melee Weapon Attack: +16 to hit, reach 5 ft., 1 target. Hit: 20 (4d6 + 6) slashing damage plus 10 (3d6) psychic damage, and the target must succeed on a DC 17 Wisdom saving throw or be stunned. additionally, if Vlaakith scores a critical hit against an astral body (such as a creature traveling using the astral projection spell), then the silver cord connecting them to the mortal world is severed. finally, Vlaakith can choose to expend a spell slot of 4th level or higher instead of trying to stun the target. if she does, then the attack does an additional 18 (4d8) necrotic damage, and Vlaakith gains temporary hit points equal to the damage taken.

queen's longbow. Ranged Weapon Attack: +12 to hit, range 300/900 feet, 1 target Hit:  14 (2d8 + 5) piercing damage. then, the arrow explodes with magical force, causing the creature hit by the arrow and every other thing within 20 feet of them to make a DC 17 Wisdom saving throw or take 36 (6d8) force damage.

parry. Vlaakith adds four to her AC against a melee attack that would hit her. to do so, she must be wielding a melee weapon and be able to see the attacker. If Vlaakith successfully blocks the attack, she can then make a melee attack against the person who just targeted her.

Vlaakith can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Vlaakith regains spent legendary actions at the start of its turn.

magic. Vlaakith casts a spell of 3rd level or lower.

greatsword Attack. Vlaakith makes a greatsword attack.

command troops (Costs 2 Actions).  Vlaakith shouts a command to all her troops. any githyanki within 300 feet can take an action as a reaction to her legendary action, but they must all take the same one. any githyanki that is deafened cannot act as a result of this legendary action. if Vlaakith cannot speak, then she cannot take this legendary action.