Imagine a place. It is empty to one inside of it, but to an outsider of infinity, one might see the plausibilities, that which might happen. This tale is about one such outsider who stepped in. By entering into the rules of the universe, the outsider bound himself to the universe. His name became Agrilnost. He then separated that which would be the air and that which would be the water, and placed himself at the head of both, the ultimate master of the water and the air.
Agrilnost examined his form, and was pleased with it. His body looked like a fog bank which rushed over the water with the speed of the rushing wind. He had a Dozen heads, all of them horned and with large amounts of teeth.
That was when Agrilnost looked over his creation, he realized something unforeseen in the separation. There was something strange about it. It was hard to understand, and when he sent out a head to probe and explore the strange earth, the taste was bizarre, it almost felt like a strange itch. So he created another one, like him a lord of this strange "land." Agrilnost rose up over the lands and called out to it, commanding it to awake and become like him.
At the master's touch, a shudder went through the virgin earth. The laws of physics that governed this place buckled and shuttered as they were subjected to a will wholly beyond their scope. It started deep in the core, beneath thousands of miles of solid stone and lava and clay. The heart of the planet was given a mind, and that mind sought out the power that had called it into existence. Something huge and alive tore itself free from the center, and tunneled swiftly straight up toward the surface.
As it squeezed and burrowed its way upward, the formless thing was stretched into a long, sinuous shape. Its head developed an indentation from pushing against the hard earth. After pressing through a few million more tons, it was split further open, into a mouth. Dirt and rocks wore away a gullet, and the body flattened and grew segmented as it thrusted and squirmed against the weight of the earth.
Finally, in an explosion of dirt, a great, stony worm exploded from the ground at the master's feet, formless, rocky mouth gasping at the thin air. As it thrashed its upper body within the empty darkness of the outer world, trying to comprehend who it was and why it was called here, its primal gaze fell upon the misty being that floated before it.
When the water and air were seperated, Ueberroth was born. It took only seconds. Deep within the oceans of the new world, a dark spark churned. Mindlessly and effortlessly, it absorbed the divine energies that it encountered, growing in size. The recent and staggering creations on this plane left their traces of divinity, and the dark spark fed on them greedily and hungrily. It had come from Elsewhere, from Outside.
It did not have a purpose, as such, and nor was it evil. It merely existed, but by its existence it twisted reality. It was the spawn of something otherwordly, something outside of space and time, and it had been placed without purpose, even accidentally. A chance mote, luckily entering this new universe. It spread, a seed, and began to bud.
Its new form was suffused with divinity, and inexorably tied to the deep. A vast, bloated mass, eyes and tentacles and senses not known betraying its strange heritage. It grew, and the universe recognised it, and made it one of its own. Ueberroth was born.
Agrilnost said to the great beast which he had conjured from the earth. "I am your lord and maker, Agrilnost. You are my ally, and shall serve me in any capacity that I need you. In return, I grant you rule of the earth. Do you accept the terms?"
Agrilnost severely hoped that the great wormbeast obeyed his command. The whole pattern depended on it.
"I have named myself Agrilnost. I am the sky above and the water around." Said each of Agrilnost's heads. He did not mention his lack of understanding of what lay over a hundred feet below the surface.
Agrilnost then said "You may explore your Land now. Go, if you wish."
Ongor was secretly glad to be free of this overwhelming presence. Though he was impressed by Angrilnost, he felt like he would rather be impressed by him from a comfortable distance.
Ongor sunk back into the earth, letting his tunnels crush themselves into dust behind him as he descended. As he dove down, he decided he was hungry, and went off in search of things to eat. However, there was no food for him at all; the entire earth was barren. How miserable it was, to be cursed with hunger in a primordial world.
To take his mind off his hunger (which he didn't know how to solve), he paced frantically back and forth beneath the earth. Vast caverns were opened by his movements, full of air and darkness and dust and connected by enormous worm-tunnels. Soon, the area was catacombed with them. Some filled up with water or lava, but most remained empty.
Mold Land (moderate) (the underdark): 2 AP
Note: this isn't a planet-wide underdark. It may become so someday, but for now it just spans a few hundred miles in each direction.
No longer content to merely sustain himself on the divine energies left by the other gods, Ueberroth undertook his first creation. In the dark depths of the primordial ocean, his great gelatinous mass quivered. In small spots on its surface, tens of metres to a side, dark lumps formed, growing in size and darkening in colour as they grew, and writhing and bulging in hundreds of places.
After some time, when the sacs had fully matured, they burst, and out came a host of plankton, fish, and algal spores. The spores would need to wait for light before they could grow, but until then, they settled into the sand of the ocean floor. The plankton and fish, for the time being, were restricted to the region near Ueberroth, as he gave up his great bulk to their sustenance - the divine wisps of power would regrow his form before any host of creatures could consume it, and so he provided the perfect food source. (Nourish Land (1 PP))
The fish, eyeless in the deeps, were not like anything another deity would make. Strange and deformed, with anatomy doubtless suited to their alien environment and creator, and grasping tentacles writhing in strange places. An oily mucus coated them, too, and if it made them unpalatable to some, to others it would make a tasty coating.
Then, to provide a further source of nourishment, Ueberroth drove a mass of tentacles deep into the ocean floor, piercing almost into the magma bed and bringing up the hot upswellings. The water, heated by the undercurrents of magma, would bring up nutritious minerals. A field of these was created, to feed his creations. (Shape Land (minor) (1 PP))
As he churned in his network of black caves, Ongor suddenly smelled something...palatable. Something had opened up burning vents in the earth, which sucked geothermal power out into the ocean. And then, something else was converting that energy into edible form.
Ongor buckled, shook, and then broke apart. Seven of his hind body segments broke off, and began moving and tunneling through the ground on their own. Each one journeyed to a hot water vent, and kept its body half-buried beneath the sand and muck on the sea floor. When largish fish came nearby, they lunged and ate them, reassimilating their life force into the earth.
Ongor was satisfied.
Create Beasts (purple worms): 2 PP
Note: in this campaign setting, purple worms are Elemental Beasts, rather than Natural ones.
Ueberroth was confused, and just a little angry. Some other spark had manifested, and had sent its burrowing scourges into his fields, to prey upon his creations and consume his efforts. It had to be stopped. Extending a long, sinuous tentacle, he speared one of the worms as it surfaced to grab a passing school, and quickly absorbed it into his form. Taking note of the worm's anatomy, of its weaknesses, and gleaning what he could of its creator, he began to fashion his perfect defense.
Warped as it was by his alien origins, his counterattack was an elegant one. The Chuuls, their entire being perfectly suited to disposing of the cowardly, opportunistic worms. Not that Ueberroth was against the taking of opportunities, but to have his own creations the target of them was an insult at best. The Chuuls would avenge this insult. As the worms surfaced, Chuul, using their own opportunity attacks, could immobolize the worms before they were even aware of the Chuul's presence. A pair, working in tandem, could keep each geothermal vent free of worms by themselves, and often dispose of a worm in a single slice of their gigantic claws.
The bodies of the worms would feed the Chuul, and the resulting spawn would grow in number, until all his fields were protected from the menace. Ueberroth was satisfied.
Create Beasts (Chuul Juggernaut): 2 PP
Note: The first four Chuul, the primordial quadruplet, are 'Chuul Juggernauts' as described in the monster manual. They spawn regular Chuul. Unlike the Monster Manual Chuul, however, they live in the deep ocean and hunt the burrowing purple worms above all else.