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Ogremoch's Bane was a drifting cloud of sentient, invisible magical dust that lived in the city of Blingdenstone since 1358 DR. Named after the lord of evil earth elementals in contrast to the presence of Entemoch's Boon, it moved around the city and any creatures from the Elemental Plane of Earth not of a good alignment that it came into contact with were driven into a mindless destructive rage. These creatures could also not be banished back home, so they must be destroyed in order to get rid of them. During the drow attack of 1371 DR, the cloud diverted quite a few of the svirfneblins' extra-planar allies from the defense of the city.
Since the fall of the city, the cloud collected more and more earth creatures, elementals, xorns, mephits, thoqquas, and others. Rather than making them rage, it had 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.
In the late 15th century DR, it was confirmed to be a native of the Elemental Planes and was sent back by a party of adventurers escaping from drow slavers of Velkynvelve hired by some deep gnome factions.
- Eric L. Boyd (1999). Drizzt Do'Urden's Guide to the Underdark. (TSR, Inc). ISBN 0-7869-1509-9.
- Bruce R. Cordell, Gwendolyn F.M. Kestrel, Jeff Quick (October 2003). Underdark. (Wizards of the Coast). ISBN 0-7869-3053-5.