Moderators of the wildly popular VORPG, Polyworld, had no idea that one of their most famous cites Edotown had been stolen and for quite some time. No wonder there were so many complaints and bug reports coming in.
What if a mage passes his powers on to his firstborn son, and a female mage to her first daughter, leaving the parent POWERLESS? A plain mortal, a sorcerer no longer, all wizardly might gone?
Or: what if a female wizard recieves the power of a mage who sires a child with her? Could lead to promiscuous witches and overly careful mages.