So tonight is a session focused on the PCs being subject to torture at the hands of their nemesis, some of them have been asking for this as an opportunity for role play and backstory reveal, and I was wondering how dark is too dark in what happens.
The nemesis is already a sick dude, one step away from insanity. He's going to kill two of their NPC favorites a la Negan from the walking dead (some went out of their way to tell me this would be cool) so I'm catering to that but I don't think they grasp how serious it will get. He'll also chop people's arms off with his lightsabers.
This is going to be a session where the PCs "lose", where they don't necessary come out without scars. But in regards to the actual stuff that happens is there anything I should avoid or keep in mind? I know this is probably a little different than what most of you do in your sessions, but my group likes dark natured content so it isn't coming out of nowhere.
Thanks everyone