The example, as I promised

Keep in mind this hasn't been edited for content or mechanics yet. It's just an example.
Fiendish Nurser
Large Outsider (Chaotic, Evil, Demon)
Hit Dice: 12d8 + 48 (102 hp)
Initiative: +6
Speed: 30 ft. (6 squares)
AC: 19 (+2 dex, +8 natural, -1 size)
Base Attacks/Grapple: +12/+21
Attack: Slam +17 (2d6+5)
Full Attack: 2 Slams +17 (2d6+5), Poison Milk +9
Space/Reach: 10 ft./10 ft.
Special Attacks: Poison Milk, Smother, Spontaneous Birth
Special Qualities: Demon traits, Regeneration 10, SR 18, DR 10/holy adamantite
Saves: Fort +12, Ref +10, Will +9
Abilities: Str 20, Dex 15, Con 18, Int 8, Wis 12, Cha 15
Skills: Balance +12, Intimidate +17, Jump +19, Listen +16, Search +16, Spot +16
Feats: Improved Initiative, Dodge, Mobility, Spring Attack
Environment: The Abyss
Organization: Brood (1 Fiendish Nurser + 2 - 6 Macetail Ravagers)
Challenge Rating: 10
Treasure: None
Alignment: Always chaotic evil
Advancement: None
This truly horrible creature is the end result of a mother who kills her own children intentionally. When dead, the soul of such a corrupt and unnatural person travels to the Abyss where their soul is forged into a Fiendish Nurser, a mother of hell, as both a reward and curse for their evil actions while alive. The nurser appears as a huge pile of armored rolls of flesh and breast tissue with thorny nipples which extend anywhere from a few inches to more than a foot from the creature's body in all directions. No discernable head can be spotted, but a large toothed orifice splits the creature's body vertically. Its roiling flesh sits on a set eight razor sharp chitinous legs which easy lift its large weight and allow the creature to jump great distances to crush enemies beneath its grotesque bulk. A nurser is very rarely alone when encountered and is usually accompanied by two to three medium sized demon spawn which appear as giant caterpillars with fanged humanoid faces and spiked mace-like tails. These often remain hidden beneath the nurser's rolls of flesh and jump out to harass and feed on nearby enemies.
The nurser cannot speak physically, but can emit a strong empathic field which tells anyone within 30 ft. what the creature is feeling at the moment.
Combat: The fiendish nurser, when entering combat, will usually employ their impressive ability to jump forward, slam into an opponent with their legs, and then retreat out of the range of most melee attacks. Their regeneration ability and low intelligence often lend to them an uncaring attitude toward danger and will run headlong into battle to attack or provide the healing powers of their milk to battling allies, even though they know such a feeding is damaging and painful to them as they're ripped apart in the battle frenzy.
Poison Milk (Ex): The milk of the fiendish nurser is deadly poisonous. It is so toxic that it can literally kill a non-fiend on contact within a few seconds. The fledgling demons which inhabit the fleshy rolls of the nurser will often grab a breast and begin squeezing in order to cover a mortal opponent with the deadly liquid. The milk inflicts 3d6 points of temporary constitution damage initially if a fortitude save (DC 18) is failed with the secondary damage being death if a second Fortitude save (DC 18) is failed. A demon which consumes the milk is healed of 3d6 points of damage per round as long as they perform no other action. Most fiends are immune to the effects of the deadly toxin, but those that are not suffer from the poison damage and death just as if they were mortal creatures.
Smother (Ex): The fiendish nurser can attempt to grapple an opponent with its front legs and then shove them deeply into its own putrescent flesh. If a successful grapple is made, the enemy is shoved deep inside the creature's body where they struggle against the weight and the almost toxic fumes of the creature's body. Every round a creature is trapped like this, they must make a constitution check against a DC of 18. If failed, the creature drops to 0 hp and begins dying as they choke and sputter into unconsciousness. A successful opposed strength check means the creature is freed from the folds of fatty tissue, but are still nauseated for 1d4 rounds afterward. Creatures that die in this matter decay rapidly and are then absorbed into the nurser, body and soul. No one absorbed in such a way can be resurrected, short of a wish or miracle.
Spontaneous Birth (Su): Perhaps the most disturbing power of the nurser is its ability to spawn the small caterpillar creatures from its flesh to use as a ranged touch attack at their highest attack bonus (since the launching is not to cause damage, but to get the macetail ravager on the enemy). This takes a full round action on the part of the nurser, but launches the fledgling fiend up to 60 ft. in any direction the nurser wishes (since the creature has no real apparent front or back). The macetail ravager which is spawned from this process is the consumed soul of a past victim, transformed into a demon within the nurser's corrupt body to be used as a weapon and servant (See Macetail Ravager stats on next page).
Demon Traits: Fiendish nursers share the following traits with other demons.
Immunities (Ex). Fiendish nursers are immune to electricity and poison and have acid, fire, and cold resistance of 10.
Regeneration (Ex): The Fiendish nurser is affected normally by holy weapons whose damage they cannot regenerate as well as any sort of spell which inflicts divine damage (such as Flame Strike) if cast from a good aligned cleric..
Habitat/Ecology: The fiendish nurser is a mobile healing font which powerful demons often summon into the midst of a battle that they are losing against their hated enemies, the devils of the nine hells. When summoned into such a situation, the fiendish nurser immediately begins attacking its own side, the fear of being ripped apart by the demonic hordes around it often overwhelm the creature's slow mind and subtle loyalties to their own side. Its ability to regenerate all damage inflicted on it by the demons feeding on it (who often rip and rend its flesh with their own claws, trying to draw the healing toxin from the creature faster than its body can make it) keep it from being totally destroyed. Often the nurser is reduced to so much demonic mush and then left to regenerate the damage to its body until it is whole again. The painful experience leaves the creature shivering in dread of being summoned into the midst of the next endless battle.
Adventure Hooks
Good/Neutral Party: A wizard of a dire nature has been consorting with demons in order to turn himself into a fiend from beyond. In order to do this, he must summon and consume the milk of a fiendish nurser and survive its deadly effects and then be torn physically to pieces by his own servants and magic and put back together again as a mockery of mortal existence. The PCs wish to stop this, since the evil spellcaster is already powerful enough without adding the power of the underworld itself to his repertoire of terror. In anticipation of the ritual, the soon-to-be fiend has sent a horde of underworld demons into a nearby village to distract the PCs who have found out about his plans from his traitorous, and now dead, apprentice. However, they should arrive just as the fiendish nurser is being restrained and milked of her poison so the villain is required to let her loose to fight off the player characters. Under the spell of her new master, the fiendish nurser is more than willing to defend the insane spellcaster from the player characters.
Evil Party: The PCs are instructed by their newly appointed lord (a polymorphed incubus) to search out a layer of the Abyss and to effect a capture of a fiendish nurser who recently broke from her circle of protection. They will escort or carry back to the prime material plane to be used as a quick healing potion factory (and the fact that the nurser's milk is considered a delicacy among noble demons when fermented). They are provided a special set of manacles which, when placed on the creature, will make it completely docile and able to follow their commands without question. However, the macetail ravagers which infest its body are not so docile and attempt to free their mistress anytime they can before the nurser is brought before the incubus which the player characters are working for. The incubus agrees to pay the party handsomely for the return of the nurser.