Primordial Evolution Game/Hastun
The tribe of Hastun:
The tribe of Hastun is a southern tentouz tribe that just arrived at the edge of the jungle after being through a long starve. They are smaller than their northern cousins due to this. They have know arrived to a bountiful but dangerous world that they are decided to tame and make theirs. But before trying to understand their story, it is rather important to know their biology.
Biology of the tentouz
This part is a bit harsh with the technobabble, but as a bio student I couldn't resist to the challenge to make work the chemistery.
Behind the mouth, the food goes in a first stomach full of digestive acid produced by a liver/pancreas-like organ. The organic matter melts and the nutriments are directed to the lymphoïc system (it's not blood, it's a hemolymphoïc fluid that does not carry oxygen). The chime of all the unwanted matter then goes to a second stomach full of a methanogen archaebacteria flora (like cows but way tougher). This stomach is equipped with a valve that opens to spread the gas into the baloon. The atmosphere being rich in oxygen, the methane gives a good buoyancy in the air. At the bottom of the "balloon", all around the gas intake sprout, is a layer of neural cells. These cells are able to synthetize thousands of different neuro-transmitter. These organic molecules goes back and forth into the gas chamber where they then exist in two different form, normal and the oxydized one with an additional acid function (R and RCOO-). The methylation is a reduction of a CH4 molecule metabolized by the surface molecules.
(1) H2O + CH4 -> 4H2 +CO2 + heat | This reaction is constantly working in order to regule the amount of gas, propulse the tentouz and produce body heat. The high amount of CH4 pushes it in the good way.
(2) NT (Neurotransmitter) + CO2 -> NT-COO- | The way of reducting a CO2 by adding an acidic function to a molecule is a pretty basic biologic reaction.
This oxidation liberates H2 molecules which are known to burst in flames in contact with oxygen. that's why the balloons burst if pierced.
When the methylated form comes back to the brain cells, it is interpreted as an information.
The brain works by interpreting the variation of partial pressure of each neuro-transmitter. All around the chambers are disposed small neural glands linked to the lymphoïc system. This allows to "save" some neuro-transmitter in liquid phase when their partial pressure becomes high in the chamber. This is basically their memory. These glands are also able to deliver into the chamber foreign molecules that were taken in the stomach or synthetized by the organism or "saved" earlier. These can be coloured molecules, bioluminescent molecules, toxins, neurotransmitters, etc. This allows them to adapt their colour in order to communicate, confuse preys...
This system can also deliver into the back limbs to create the deadly bane-bubbles. The back sprouts only deliver H2 surplus that bursts in contact with oxygen and then propulses the creature. Their air holes acts directly as an interface to extract oxygen and have the sense of scent. The oxygen is carried in a secondary system of actual blood vessels. This system does not ever enter in contact with the gas chambers.
They have also a basic nervous system to control their limbs and the various valves scattered between the gas chambers and stomachs. The back tentacle are carved by an extension of their stomach richly vascularized with hemolymph vessels and covered by mucus producing cells. That allows them to create acidic poisonous and flammable bane mucus.
The neuro-transmitter and their receptors on the brain cells are randomly synthetized by random gene splitting (that's the immunoglobuline synthesis way) Then, like the antibodies, these receptor can randomly be sensible to some foreign molecule. This molecule can temporally become a new "thought component". In fact sentience of the tentouz depends on their ability to absorb various foreign organic molecules in order to complexize their minds. A starving tentouz will become pale and get back to animal stage until it can feed properly again to wake up its mind and have back access to its dormant memory. The aging of the tentouz is very slow, allowing them to last many years even in the dormancy stage.
The tentouz have a very low mechanical power in their limbs. They can't lift great weights nor strike with strength. However, its four opposed tentacle digits are very dexterous. The tentouz have the poorest audition. Their internal ear is almost entirely used for its balance keeping role.
Tentouz have a long lifespan (around 200 years if unharmed) and are unaffected by a lot of poisonous substances. They are hermaphroditic and reproduce by giving birth to a single larvae which have a long growth and need a lot of nutrients. The tentouz reproduce very slowly.
tl;dr: They fly with methane coming from bacteries of their stomach. Brain works with a pool of gas where all the neurotransmitter go. It can adapt with what they eat. They have colour shifting they use to communicate. They push themselves with a gas that burns in oxygen. They can throw bubbles of acidic poisonous mucus. If they starve they become pale and insentient.
History of Hastun
Prologue: the first tale:
The first tale of the Hastun: "The land that shall bear our lives, shall be ours untill the end of time"
The colour shades that may mean this has not been worn for a long time on the hides of the pale remnants of the hastun. But the words has not been forgotten, still inscribed deeply in the dormant memories since the beggining of the great starve. The prophet of these words may still be living in the pack, as pale and as the others, no longer differenciabe from its pairs. They have been guiding instinctively by this fix idea to seek for a more bounteous land. Wandering and roaming unnoticed on the desert sky for decades, they have forgotten the way to be themselves. But in a day, a green horizon appears, dawn to a new era. The hastun catches a prey, feeds on it and awakes. Then he knows that he must stay awakened for ever. A few hours past, and the entire tribe is back on its minds. Their hides turns blue again, and then moving shades start to scatter around in tidal colour waves. The skin on their foreheads pulses and a sketch starts to design itself. The words appear again: "The land that shall bear our lives, shall be ours untill the end of time" they become the sigil of the hastun. All wear it, but then an other word, made of darker shades is formed. The word of their forgotten past, their lost origins. This word becomes sense of obliviousness and sacrilege. Forgetting is forbidden.