Sooner or later the party stops dealing with one person and starts dealing with the people behind them: the cult under the chapel, the family that runs the docks, the corporation that owns the lifts. This is one A4 page for that organisation, written so you can play it the way you play an NPC — with a want, a plan and a weak spot.
A name, a kind — cult, gang, family, guild, corporation, agency — how far it reaches and where you go to find it. Under that, the face it shows the street beside what only its own people know, what it wants right now and how it gets things done.
Then the answers the players will ask for: who runs it and how to reach each of them, what it has and what each asset is for, and who its friends and enemies are. Below that, what it does next if nobody stops it, one step at a time, each with the sign the players will notice — and at the foot, where it breaks and how it finds the party.
System neutral, A4 at 300 DPI as a PNG or a PDF, and a fillable PDF with a blank copy. The evening it acts in is a Session Planner, and the people who run it each get an NPC Sheet.