With that disclaimer in mind, and the fact that this hazard is far from “by the book” I’d like to present to you what I’ve comeup with for Strahd’s Choking Fog within the 4e ruleset. This hazard applies for Combat and RP situations simultaneously within one stat block.
I’ve been pretty happy with it so far and while my adventurers have yet to traverse the fog without aid of the Vistani elixir, you never know what horrible tradgedy may befall their supplies…[fancy_images height=386 width=200 align=center] https://dreadgazebo.net/wp-content/uploads/2011/04/ChokingFog.png
This couldn’t come at a better time! My players are about to enter Barovia and I can definitely use a little mechanical aid for setting the tone of the place.