Does anyone have any advice on how you would stat up the Scarecrow's Fear Gas? Was planning on using him and other Gotham Rogues in an upcoming adventure.
The gas itself would simply have Fear Factor at a suitably high rating - probably Fear Factor 4. But if you want more interesting or varied effects, use Hypnosis (Major) instead, though probably restricted to extreme emotional responses. Other traits would depend largely on the delivery system for the gas.