Biodolan

Arсanians are a kind of super-developed beings that combine the harmony of technology and organics.  It has a collective mind, but also different instances can act independently of others. 

Their main passion is the mutilation of others and imitation, because of this, the species may differ from individual to individual, leaving key features. 

Biological energy is hidden in the metal shell, which can be released in case of critical damage. This way they can regenerate parts of themselves. The higher organisms in their colony can control their organics at will, the lower classes can use it only in emergency situations