Homunculus race

Race homunculus

Homunculi -- small artificial creatures crafted by novice mages for practice. Part frog, part golem, part whatever was lying around at the time.

Magic can't summon them -- they themselves are the result of magic and refuse to migrate between casters. Spells, though, run right through a homunculus: coarse magic isn't fit for fine work.

They dwell in MUD School, where they serve as practice targets for freshly minted heroes. Out in the wild they're nearly unheard of -- only the odd escapee.