It would be ridiculously cool if you could do an expensive lab procedure to steal the body of a slave.
- Get their race, cosmetics, level and attributes
- Keep your spells, reputation (though maybe lose a bit because it's monstrous, and people wouldn't recognize you)
- Not sure which way would be appropriate for abilities to go, or tattoos.
It's unlikely to be overpowered because it would be expensive and require a level 2 lab - by the time you could afford that and the procedures, you probably have played for quite a while, whether fighting or earning.