(Edited from original source to better fit RPs setting.)
Phyrexians, are an immortal species of this world.
A form of bio-mechanical life that due to their determination to replace flawed flesh with more efficient mechanical parts sit in a strange state of unlife. They do not die of age, but CAN be killed if one tries hard enough.
Phyrexians come in all shapes and sizes depending on an individuals age, purpose, and level of respect among their community. They all start out humanoid, with some differences and eventually are remade to fit whatever purpose or goal they are created for. They range from having slightly mechanical modifications and many parts still left made of necrotic flesh, to fully mechanical. All of them have oil-blood. And most carry horrible diseases.
Most do not need to eat, though the ones that do are carnivorous. Many do not need to sleep.
Description of the life of an individual of this species, with notable events: e.g. if there is usually a childhood or coming of age ceremony, marriage customs, retirement or old age feasts, burials, ...
What classes are commonly found amongst this race?