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Above the gills and mouths, the body’s crown divided up into the four sensory stalks, which were the most pliable of all its limbs, capable of bending and twisting in every direction. At the very apex of them was the delicate nerve receptor, a thin impulse-permeable membrane stretched over raw ganglions; slightly below them were the eyes, then a pressure-sensitive blister that could detect sound waves, a plume of thin chemically responsive fibers that smelled the air, and a cluster of tactile cells capable of detecting temperature.

For such creatures, modifying the area around the pool to their own requirements was a relatively simple matter. They had long since mastered the rudiments of tool use, and quickly adapted sharp stones and sections of hard bark from the nearby trees. Using these as shovels and scoops, the twelve of them dug a shallow pond slightly upstream from the main pool, then lined it with stone taken from the excavated soil.

With the work complete, the four largest motiles waded into the pond, and once again linked their nerve receptors. This time the union went a lot deeper than simply connecting their thoughts. Their bodies were pressed up tight together, ready for amalgamation. The process was triggered by an internal hormone deluge brought on by the mental merger. Over the subsequent five weeks they underwent a tremendous metamorphosis. Their four separate bodies slowly coalesced on a cellular level to produce a single entity. Where their skin touched, it softened and melted away, creating a single giant body cavity. Inside that, their brains fused together and expanded; a transformation pattern followed by most of the major organs. The muscles simply wasted away, providing a source of nutrition to power the other changes. Legs shrank until they were nothing but a circular series of solid fleshy lumps that supported the new large body. Arms shriveled and dropped off, there was no need for them now. Digestive organs stretched out, and spread up around the new singular brain, like shoots of ivy twining around a tree trunk; underneath the brain, there was a new growth. The reproductive system that until now had been nascent began to grow into fully viable organs. Only the sensory stalks remained the same, feeding the developing brain a dodecagonal impression of the world around it.

At the end of the process, the new immotile Prime, MorningLightMountain, began to secure its territory. The remaining eight motiles came and went continually, feeding the immotile with their regurgitated pap. They had been instructed to gorge themselves on specific types of plants, enriching their food with certain vitamin types.

Triggered by the nourishment contained within its food, MorningLightMountain’s reproductive organs began to ovulate. The first batch of a hundred nucleiplasms was discharged from its body into the water, allowing them to drift down to the large pool. Base cells began to congregate around them.

By themselves, Prime base cells followed a life cycle similar to amoebas; they absorbed food through their membrane walls, and reproduced by fission, remaining a single-cell life-form that inhabited most of the planet’s waterways. But they also carried the DNA for a lot more than that. It was the nucleiplasms that initiated the multicellular stage, releasing activants for new sequences in the DNA, and switching off the amoeba-stage sequence. The cluster of cells around the nucleiplasm began to change, developing fresh organelles that provided specific functions. Like any multicellular organism, the cells began to specialize. The immotile had a degree of control over the type of nucleiplasm it gestated inside its reproduction system. By consciously controlling hormone secretion into the nucleiplasm, it could dictate the size of various organs, and by doing so design the structure and composition of a motile. If it needed heavy work doing, it would produce a batch of nucleiplasms that would congregate the largest and strongest motile. In a time when its territory was under threat, nucleiplasm to engender soldiers would be released.

The first herd of MorningLightMountain’s motiles began to wade out of the pond after three weeks of congregation. The existing motiles guided them over to the immotile, who touched its nerve receptors to theirs. Memory and instructions flashed through the impulse-permeable membrane, filling the motiles’ virgin brains with a compact version of its own thoughts.