Was thinking about cayvie's ideas further up and treestumps and hydras and I came up with this idea for a setup:
Blob Mafia
Night Zero, scum picks a player to start "The Blob"
Day lynches and night kills work basically normally, but instead of being killed, players are added to The Blob, and don't flip
Players in The Blob may still post in the main thread. The Blob also gets a single vote, controlled by plurality of the players in it
At night The Blob gets an action, this time controlled by majority. They can Reveal, which reveals to the players in the Blob how many Mafia players are currently in The Blob. They can add another player to The Blob. They can expel a player from The Blob, returning them to normal. The same action can't be repeated two nights in a row
Town wins if all Mafia players are in The Blob. Scum wins if there are more Mafia players than Town outside of The Blob
Thoughts? Would this be something people wanted to play? What sort of numbers sound balanced?