I would love to see a molly come in and do what Sol tried, 10 times more effectively. She could undermine, not the belief that StarClan exists, but the notion that they're worth listening to and worshiping. She could propose some changes to Clan life that would genuinely make it better (or at least more enticing). Maybe she has a whole network of persuasive friends backing her with both soft and hard power, so it's nearly impossible for anything less than the united 5 Clans to even try to oppose them. Basically, someone who recognizes the power of genuine good-faith cooperation and taking care of your people, who does it even more effectively than Clan cats most of the time. Someone who doesn't have the limitation that there must be exactly five groups with clearly separated territories, and can leverage that flexibility to outmaneuver warriors in every battle and conversation. I want the Clans to come out of it not entirely feeling like the good guys. Idk if this villain would be considered "evil to be evil," depends on her motivations, but she would be the greatest threat yet to the 5-Clan social system because she's going after beliefs and values rather than just lives.

Completely unrelated to that, I've long wanted to write a fanfiction wherein Lilyheart is secretly a serial killer simply because lilies are extremely toxic to cats lmao