These areas of Samaragd contain tainted atmosphere.
Effect: While in an area of soul venom, a creature gains vulnerable 5 poison per tier, or vulnerable 10 poison per tier while bloodied. Creatures that have immunity or resistance to poison are immune to these effects.
Usage: Add patches of soul venom to an encounter with medusas or other poison-using creatures that have poison resistance or immunity to give them a bigger punch.
Published in The Plane Above, page(s) 87.