Corpses spread corpsedust. They are able to spread more corpsedust than their own body weight in the same way that, in Hell, a human can bleed more than his own weight. Corpses do not need to eat to replenish their dust though after consuming another human the amount of dust they spread tends to increase.
When spread on a dead body, that body becomes an animated corpse. If ingested by or touching a live person who dies while enough dust is still on them, they will rise. When spread on food, the food will rot. A thimbleful of corpse dust can rot nearly one square foot of food.
When spread on old world items such as guns or clothes, the items age appreciably. For this reason, it is not recommended that one bludgeon a corpse to death with a prized rifle. Immediate cleaning of items after exposure lessens the corpsedust’s effect.
When consumed, corpse dust has negative effects. See: Corpse Eater.
If properly distilled, corpse dust can mimic the effects of old world alcohol without any of the dangers usually associated with consuming the substance.
Corpsedust is also rather handy when dealing with wights. A wight may be tricked into consuming corpsedust by feeding it corpsestone or a corpse eater. Corpsdust diminishes the wight into a mere corpse if given in high enough quantities. It has been suggested that the more powerful the Wight, the more corpsedust must be consumed to negate its powers.