Ogremoch's Bane

Ogremoch's Bane is a drifting cloud of sentient, invisible magical dust that has lived in the city of Blingdenstone since 1358 DR. Named after the lord of evil earth elementals to contrast the presence of Entemoch's Boon, it moves around the city and any creatures from the Elemental Plane of Earth not of a good alignment that it comes into contact with are driven into a mindless destructive rage. These creatures also cannot be banished back home so must be destroyed in order to get rid of them. During the drow attack of 1371, the cloud diverted quite a few of the Svirfneblin's extra-planar allies from the defence of the city.

Since the fall of the city, the cloud has been collecting more and more earth creatures, elementals, xorns, mephits, thoqquas and others. Rather than making them rage, it has them stand still as statues at the rear of the cavern that housed the city, whispering promises of victory and glory to them in Terran for some unknown purpose.

Elder gnome priests have always theorised that the cloud's presence is somehow tied to that of Entemoch's Boon.