SoulChasers

For thousands of years, the place where I live has been terrorized by a powerful sorcerer by the name of Ismof. Once every other month, he uses his magic to kidnap somebody and teleport them to his castle, which is this huge black fortress that moves once a month, making it impossible to find. He somehow removes the soul of the person from their body and places it in his collection, which is a room with shelves upon shelves of souls. Throughout the next week, his victim will remain alive, but unconscious, chained up in a small, dark, room.
Try and rescue them if you dare. He releases all sorts of demons and sets all sorts of traps, to try and stop anyone coming to rescue their love ones from his palace. And if that doesn't get you, once you get inside the castle, Ismof himself will kill you.