Onirodes are one of the 7 peoples made by the Artisans before the War in Heaven. They are split among 4 castes or erga, but they all feature some similarities. Their body is composed of aluminum and appears skeleton-like, but they are simply thin and have an exoskeleton. Each healthy Onirode has 6 limbs and 5 eyes. Their diet is omnivorous.
Dromaeërga are fast Onirode erga with a horse-like bodyplan, while also bearing a pair of mantis-like arms. Their whole body measures up to 3 metres in length, if stretched. Their tails end in a colorful, feathery fan. Their primary function is as scouters and transporters of goods.
Hadrerga are geavy-set Onirodes who walk on their first and third pairs of limbs. The middle pair is shaped like a massive comb with which they plough the land for the souls of tiny creatures, such as bugs and worms. They are slow but strong and can endure long journeys.
Sometimes, these tractor truck-like individuals will help their fellow dromaeërga by pulling them.
Macherga are one of many guardian type creations of the Artisans. Their original purpose was to protect mnemothecae, but now they also guard their kingdom. Anatomically, they possess a distinctively arched version of the dromaeërgon body but with a horned head, deeper thorax and most notably, a tail split into two prehensile whipswords. The tails measure around 4 metres each and the rest of the body is marginally longer than that of a dromaeërgon.
Taxerga are the main working ergon. Their bodies are almost serpentine, at almost 3 metres in length while also being coilable. All of their 6 limbs end in hands that can be used to grasp things. They bear feathers in their necks and tails.
While other erga were made for field work, taxerga were designed for working indoors. They make for great librarians, for example, thanks to their also outstanding memory.
All Onirodes share the same basic genome, regardless of caste. When two onirodes breed, the egg that ensues will have epigenetic markers that will stop the embryo from growing into the caste of either mother. This ensures a well varied population. It must be noted that macherga are invariably uncommon.