This is a Halloween Horror: it will pop up when Halloween comes close, and I hope you find a way to make use of it.
A new -=freebee=- waits for you at drivethrurpg.com: The Blood-Drenched Room
This product is an independent production by me, Gregorius21778 and is not affiliated with Lamentations of the Flame Princess. Lamentations of the Flame Princess is a registered trademark owned by James Edward Raggi IV.
The Blood-Drenched Room is a place that has been formed by mankind murdering and slaughtering another. It may be summoned by a Magic-User (as a special, stand alone version of the Level 1 Summon spell, found on p.134 of the Player Core Book: Summon the Blood-Drenched Room), so that it is just behind the door the summoner opens after the spells has been cast. It has another door that leads out of it, and if the Magic-User was able to dominate the Room this very door may open into any other room were a life was taken and blood was spilled within this very turn. Distance does not matter, all that matter is death and blood. When the spell has been cast successfully, the door it was cast upon will lead into the Blood Drenched Room for 2d6 rounds. Anybody may pass through the door this way. Those who wish to get to the room that physically is behind the door must close it, pass a Saving Throw vs. Devices, and open it again. But once the door is closed once more, it will open up into the Blood Drenched Room again (until the duration ends, see above).
What are you waiting for? Get your copy while it is online! Happy Halloween!