Speak with Aerial Creatures. When it speaks in Abyssal the thrall of pazuzu can communicate with any creature that has a fly speed. If the creature has an intelligence lower than 8 it will only understand simple concepts.

Spellcasting. The thrall is a 4th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 12, +4 to hit with spell attacks). The fanatic has the following spells prepared:

Cantrips (at will): friends, poison spray, prestidigitation, vicious mockery

1st level (4 slots): command, inflict wounds, shield of faith

2nd level (3 slots): dust devil, hold person 

Wings of Pazuzu. The thrall has grown a pair of black raven wings; this gift from Pazuzu grants it the power of flight.​

Multiattack. The thrall makes two attacks. It can use its rapier or a dagger for either attack.

Dagger. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one creature. Hit: 4 (1d4 + 2) piercing damage.

Rapier. Melee Weapon Attack: +4 to hit, reach 5 ft. Hit: 6 (1d8 + 2) piercing damage.

Bewitch Aerial Creature (Recharges After Long Rest). The thrall of pazuzu selects a creature with a fly speed it can see within 60 feet. The aerial creature must succeed at a DC 12 Wisdom saving throw, with advantage if the creature is hostile (which will always be the case if the thrall or their allies are fighting it). If it fails the saving throw, it is charmed by the thrall for 1 hour during which it regards the thrall as a friendly acquaintance.
 The thrall can use an action to compel a bewitched aerial creature to perform a specific action, such as "charge that creature and attack it", "pick up this object and follow me" or "go to that wall and pull the leftmost lever". The creature makes a DC 12 Wisdom saving throw. If it fails, it must use its reaction to move up to its speed and make a melee attack (or another action of similar complexity) as the thrall directed. If the save succeeded, the creature falls prone and makes another Wisdom saving throw which ends the charm effect if it succeeds.
 Each time the charmed creature takes damage, it makes a new Wisdom saving throw. The effect ends if the save succeeds.
 An aerial creature knows it was charmed by the thrall when the effect ends. If the creature ended the charm with a successful Wisdom save, it becomes immune to the thrall's bewitchment for the next 24 hours.

Pazrael's Breath (Recharges After A Long Rest). The thrall of pazuzu exhales a demonic locust swarm into an adjacent space (see Swarm of Demonic Locusts for statistics). The thrall can exhale the swarm into areas occupied by other creatures, including the thrall itself. Roll initiative for the swarm, which has its own turns. It obeys any verbal commands the thrall gives it in Abyssal. The swarm never attacks the thrall and recognizes the thrall's allies. If the thrall doesn't issue any commands, the swarm starts attacking random creatures and devouring vegetation while defending itself from hostile creatures and trying to stay within 30 feet of the thrall. An undirected swarm that has no victims or crops in sight will slake its thirst for destruction by vandalizing property. The swarm vanishes back to the lower aerial kingdoms after 6 rounds. It also disappears when it drops to 0 hit points or if the thrall orders it to return home.

Lethal Legerdemain. The thrall makes one melee or ranged attack with a dagger.

Noxious Spores (Recharge 5-6).  The thrall coughs a cloud of toxic spores at a creature within 15 feet. The target must succeed on a DC 12 Constitution saving throw or be poisoned for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. Emptying a vial of holy water on the target also ends the effect on it.