So I made my submission today, which I will share below. I hope there isn't any similarity with any other entries in the book. Can't wait to see if it is accepted and what the illustration will look like. I used to draw a long time ago, but alas, my skills are pretty feeble these days.
The Ghoul Queen
Goddess of Ghouls
Symbol: A gnawled bone
Movement: 120', 90' (tunneling)
Armor Class: 0
Hit Points (Hit Dice): 100 (HD: 12)
Damage: Bite (2d6), 2 claws (1d10 + paralysis)
Hoard Class: XVIII
Khorissa's natural form is that of an emaciated woman of almost skeletal countenance, greenish skin stretched tight over her bony frame and with sagging, pendulous breasts. Despite her appearance, she has supernatural strength which allows her to rend flesh with her long dirty, blood-stained fingernails and crack bones with her teeth. She is covered with dirt, stinks of decay, and accompanied by a swarm of flies. This stench is similar to a Ghast's but is -4 to any saves to resist. The swarm of flies act to distract anyone wishing to attack the Ghoul Queen by imposing a -5 to-hit.
She may shape-change to appear as a beautiful, if pale-skinned human female with long, dark hair. She usually takes this more pleasing form to get close to her prey before striking. In this form, she does not have her stench ability or the swarm of flies. It takes her 1 round to change between either form.
Khorissa is usually hungry and always seeking a meal in the form of any nearby dead corpses or live prey. She does not like the taste of elves and will refuse to eat their corpses. She is worshiped by ghouls and ghasts.
Khorissa can be encountered stalking graveyards or other subterranean places where there is ample supply of dead bodies to feast on. There is a 15% chance that any PC's attacking ghouls in their warren will attract the attention of Khorissa and she will appear.
Khorissa Reaction Chart (2d6) (+4 if recently attacked/killed ghouls or ghasts)
2 Friendly: Will cast 1 Necromantic spell for the party if that will help them.
3 - 5 Indifferent: Allows PCs to leave unharmed and may answer 1 or 2 questions about the dungeon or graveyard they are in.
6 - 9 Neutral: Ignores nearby creatures.
10-11 Unfriendly: Attacks any nearby creatures unless appeased. Appeasement is usually an offering of a live victim.
12 Hostile: Attacks any nearby creatures. Summons additional 2d6 ghouls.