Morbid Minish
Spooky Scary Skeleton.
True. I wish funnier had started the trial later... if all the threats were known, and it works as proposed, it would be an instant win, as town wins when there's no threat in play at the start of the day. They would have no way to come back in time. Unfortunately right now we might still have someone around who can get them back.
It exiles the unknown threats as well. They're just not a part of the trial. We'll still have one threat if Spiderman pleads guilty since he'll become the only threat left. But we should hopefully be able to deal with that easily.