Not sure on the exact composition of roles and of size (I was thinking something like 16 or so), but basically, I thought of a game mechanic that I want to turn into an open setup.
Essentially, there's a serial killer.
The town has a lynch, the scum a nightkill.
But the town has a second lynch, and the scum a second nightkill--yet the serial killer gets to control if it goes through or not. Basically, the first town lynch is done normally. The second town lynch is also done normally, but before the flip, there's a twilight phase where the serial killer gets to choose whether that lynch goes through or not. (The serial killer does not have the capability to change the result--at least, not in the setup I have in mind. I can see it maybe being done as a one-shot power, but that's not what I had thought of.)
Same for the scum's nightkill. Their first nightkill selection will go through as normal. They select a second nightkill target, and there's a dawn phase where the serial killer gets to choose if the second nightkill goes through or not. (The serial killer does not get to choose the kill. Again, at least not in the setup I have in mind; I can see it maybe being done as a one-shot power, similar to the lynch.)
If the serial killer dies*, then both the second lynch and nightkill are lost, and the game mechanics become normal again.
I don't have the details ironed out (player size, what power roles to have, the name of the setup**
), but I was wondering if it seems like a good idea for an open game setup.
*If all the mafia die, then the serial killer gets to select a nightkill, becoming a normal serial killer, but the second lynch remains.
If the serial killer is the only surviving scum in 4p mylo and the town mislynches on the first half of a day, the serial killer also wins because they can veto the second lynch and nightkill a player to bring it to 1:1.
** I was thinking of a name along the lines of "The Mediator", but that doesn't seem to be perfect.