This is the lair of a grand master vampire complete with working dungeon and execution pit for rogue vampires. (I successfully kept four town sims prisoner for over a week for feeding purposes. They only escaped when I changed household that I was playing. Otherwise, they'd stayed prisoner through exit game as long as I didn't changed played household. I also tested the execution pit and confirmed it works as long as they do not have the move as mist power or immunity to sun.)