Mold

The Mold is a destructive force of decay that is running rampart in parts of the Western Plaguelands, notably Thondoril. It has rendered the main route to Hearthglen impassible, though the stronghold itself is thought to be largely unaffected by the phenomenon.

Characteristics
The Mold is largely composed of various fungi and molds, and seems strongest in areas that were formerly strongholds of the Scourge. It is not thought to be a derivative of undeath or necromantic energies and has been seen to destroy the undead just as quickly as the living.

Instead, the mold is thought to be a natural force of decay that takes root to amplify the processes of rot and decomposition that the magics of necromancy had put in suspension.