The Midnight Mauler (2011)

From the publisher's website:

The Decemvirate sends members of the Pathfinder Society to the former crown jewel of Ustalav's royal courts, the decaying city of Ardis. Tasked by the Society to look into the fate of Absalom's former Master of Blades, Vonran Vilk, what they find will lead to exploration, diplomacy, murder, haunted pasts, and tragic love. Can the PCs stop the rampage of the Midnight Mauler before he kills again?

The Midnight Mauler is an exclusive adventure to be run only by 4-star GMs and Venture-Captains for its first year.

A Pathfinder Society Scenario designed for 1st to 7th level characters (Tiers: 1-2, 3-4, and 6-7).

This scenario is designed for play in Pathfinder Society Organized Play, but can easily be adapted for use with any world. This scenario is compliant with the Open Game License (OGL) and is suitable for use with the Pathfinder Roleplaying Game.

From publisher blurb:

Note: This scenario has been updated from its exclusive version for public release. Purchasers have access to both the exclusive version released as Pathfinder Society Scenario #2–EX and Pathfinder Society Scenario #3–16, but as of February 29, 2012, only the latter is legal for Pathfinder Society organized play. Except for minor changes involving faction missions and general copyediting, both versions of the scenario are the same; only the legal version of the scenario contains a Chronicle sheet.