The Imps, despised and loathed by everyone, are mostly found at the fringes of Midgaardian civilization. At least that is true for the common incarnations of this race, the lesser and minor imps. Some of the more distant relatives are quite secretive - the reason for this, as most Midgaardian's will testify - is most likely their fear to face up to any proper work or fight.
In rare circumstances Imps seem do be struck down by an odd kind of disease, causing an extreme form of metamorphosis. Some claim that this is not an illness, but a voluntary action. Either way, during this process the appearance and abilities of the Imp are completely transformed - but surely not always to the better.
This is an evolutionary race. They can go through radical changes at the listed levels once they decide to evolve and have aquired the necessary knowledge.
Continued growth without evolving into a new form will become harder and harder once beyond the suitable size, until it becomes completely impossible. Similar, there is no shortcut through the process of growth, every inch of the way has to be gone.
Due to the innate curse of Imps in their various forms they will never be able to follow the path of priesthood.
Another distinct kind of Imps are known to steal gear from other travellers. Those creatures are known as Gear Imps, and have their own separate story.
The evolutionary chain for Imp is as follows: