About a month back I had one. She had effectively reached the point of unkillable (stopping time for 7 hours will do that), and was wearing full artifact gear. She could (and often did) kill hordes using nothing but chain lightning, and, in dire situations, her magical flesh eating toys.
She was the only survivor I ever retired as a hero. After 10 years in game (100 day seasons), I decided to turn an evac shelter that still had npcs into a veritable safe haven for the tired and weary. It had over 100 beds, massive farm land, multiple water pumps, a 3 layer thick fence, a power array (which used to be my jumbo car), and a laser turret defense system. She even released some manhacks on security detail. After all that work, she sat down, drank a gallon of vodka, and enjoyed her retirement.