better xarodok

Duergar Resilience. The duergar has advantage on saving throws against poison, spells, and illusions, as well as to resist being charmed or paralyzed.

Sunlight Sensitivity. While in sunlight, the duergar has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Spellcasting. Xarodoks spellcasting ability is charisma. (spell save DC 16, +8 to hit with spell attacks

cantrips: eldritch blast, mage hand, minor illusion 

4th level spells(2 slots): dimension door, vampiric touch, blight, hold person, gaseous form, *slow(from an eldritch invocation)
 

Cloak of flies: As a bonus action, xarodok can surround himself with a magical aura that looks like buzzing flies. The aura extends 5 feet from him in every direction, but not through total cover.The aura grants him advantage on Charisma (Intimidation) checks but disadvantage on all other Charisma checks. Any other creature that starts its turn in the aura takes 5 poison damage.

 hexblades curse: Xarodok place a baleful curse on someone. As a bonus action, choose one creature he can see within 30 feet of him. The target is cursed for 1 minute. The curse ends early if the target dies  or xarodok are incapacitated. Until the curse ends, he gain the following benefits:

• bonus to damage rolls of proficiency bonus(+3)

• Any attack roll against the cursed target is a critical hit on a roll of 19 or 20 on the d20.

• If the cursed target dies, he regains 13 hit points 

Enlarge (Recharges after a Short or Long Rest). For 1 minute, the duergar magically increases in size, along with anything it is wearing or carrying. While enlarged, the duergar is Large, doubles its damage dice on Strength-based weapon attacks (included in the attacks), and makes Strength checks and Strength saving throws with advantage. If the duergar lacks the room to become Large, it attains the maximum size possible in the space available.

multiattack. xarodok can make two attacks with his war pick or cast eldritch blast twice

War Pick. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10(1d8 + 3) piercing damage, or 16 (2d8 + 3 piercing damage while enlarged.

Eldritch blast(cantrip) ranged spell attack: +8 to hit, range 120ft, single target. Hit: 10(1d10+5) force damage

Invisibility (Recharges after a Short or Long Rest). The duergar magically turns invisible until it attacks, casts a spell, or uses its Enlarge, or until its concentration is broken, up to 1 hour (as if concentrating on a spell). Any equipment the duergar wears or carries is invisible with it.