#Dungeon23 Tomb of the Vampire Queen, Level 8, Room 17

 Beyond the secret door in room 14 takes the party to room 17.  A small passage leads to a large open chamber. A loud droning sound can be heard from all over.

Inside this room are two large Fly Demons.

Fly Demon

Armor Class: 1 [18]
Hit Dice: 8+8**** (44 hp)
Attacks: 4 claws (1d4+1x2), 1 bite (1d8) + disease
Special: Diseased bite, demonic abilities, fear, detect invisible, darkness, drone
THAC0: 12 [+7]
Movement: 90' (30')
  Fly: 240' (80')
Saving Throws: D8 W9 P10 B11 S12 SS 8 (8)
Morale: 8
Alignment: Chaotic evil
XP: 2,608 (OSE) 2,000 (S&W) 3,040 (LL)
Number Appearing: 1d3 (1d6)
Treasure Type: B

Fly demons are known by a variety of names, and they may all be different species or sub-species of demons, but they all have similar characteristics if different overall appearances. All fly demons appear to be a horrid combination of humanoid and fly.  Some smaller species are only 4' long, while larger ones are up to 7'. They have large insect-like wings, humanoid heads, and faces, with large multi-faceted eyes. Their bodies are like that of an insect with six limbs. Each limb ends in a horrid-looking claw.

These demons attack with their four forelimbs. Their back limbs are often used as humanoid legs. Each claw can do 1d4+1 hp of damage. Their bite, though, causes 1d8 points of damage and transmits a horrible wasting disease where the wound continues to eat away at the body converting it to dead flesh. A saving throw vs. Paralysis must be made. If successful, the victim takes an additional 1d8 of acid damage. On a fail, the disease progresses and does 1d8 hp of damage per hour until removed by a Cure Disease or Heal spell. When is victim reaches 0 hp, they will be eaten by any fly demon remaining. 

Fly demons also have the following powers, usable once per day. They can cast an aura of fear in a 30' radius, detect invisible, and cast a sphere of darkness 10' radius. Their favorite tactic is to cast their fear aura and, when a victim gets closer, invoke their sphere of darkness.  The fly demon can also cast the Drone spell three times per day.  These demons take only half damage from electricity, cold, fire, and poison gas. Holy water will do 1d8 hp of damage to them.

All fly demons, regardless of their origin, sub-species, or even alignment, are controlled by the devil Beelzebub, the "Lord of the Flies."  They will instantly obey his summons and will carry his orders even unto their own deaths. When Beelzebub is present, their morale is effectively 12. 

Fly demons can speak telepathically but also do so with their insect-like mouths. Their voices drone and buzz like that of an insect. Warlocks of Beelzebub are often visited by flies of all sorts, including fly demons. The demons are instructed not to harm the warlocks in Beelzebub's pact, but they see all humanoids as nothing more than potential meat.