Warforged

Their lifespans are much different. Their bodies tend to wear away after about 250 years and might last until 300. Once that gives out their souls begin to leak and leave the living world behind. They are most common in areas where technology is big, but are not all that common due to the way they are 'born'. They are reactivated constructs of magical construction for the old age that a soul has decided to take up as a home. The soul does not remember it's past and is essentially born anew, but it attaching to the body also greatly accelerates the deterioration of the body. Since they are no longer made and are from the past, they are not 'reproduced' as a race.