Corpses are automated bodies of dead humans.
As best we can tell, Hell is devoid of microorganisms. Decomposition does occur, however, if a perishable item has been touched by a corpse. Corpses spread corpse dust, which causes this decomposition. While this is more immediately noticeable in clothing or food, it will also age metal, wood, and earthly stone. Infidel friend always recommend washing all items that come in contact with corpse dust as soon as possible. For more on corpse dust, see: corpse dust.
When a corpse first rises, it moves rather stiffly, has poor coordination and its ability to recall muscle memory from its previous life is highly limited and often confused. However, its initial spread of corpse dust is quite severe. The strength of a new corpse has been guessed at being roughly 50% of its former human self. As time passes, the amount of corpse dust lessens. After 1 month, the corpse gives off only a thimble or so every hour when left undisturbed. This amount increases after a kill.
The strength and agility of the creatures increases with time. Corpses over a century old have been seen keeping pace with a jogging human, although even at such an age, such a concerted effort of such a creature is rare. After a decade the corpse’s strength is at roughly 90% if its former body, and its motor skills are vastly improved, although corpses who have been great shots in life have only performed marginally better than their counterparts. Corpses appear to learn no new skills. For instance, a human who never fired a gun in his life will not fire a gun in death, no matter how convenient, unless in the accidental pursuit of some other action. However, as a corpse repeats an action it performed in life it does become more efficient. Corpses have been observed exhibiting cunning behavior although whether this is performed by chance or was a behavior once performed and then mechanically repeated—or perhaps even some sort of shadow cognition, we are as yet unable to say. While the Infidel has reported that he has observed a corpse speaking, this has not been verifiably recorded elsewhere. Trusting the Infidel, we have come up with three explanations: 1) Corpses speak very rarely. 2) the Infidel actually observed a corpse eater. 3) The Infidel does not distinguish between corpses and wights. There may be some evidence that wights and corpses are the same beings in different phases of development; although it is also possible that this change requires more than just time. Perhaps in the same manner of a dyitzu and a dark dyitzu, which requires the affectation of a Minotaur. It has also been noted that certain substances can cause a corpse to become more or less violent. Others can be used to lead a zombie along a certain trail. The similarity of these chemical signals to ants is enough to lend some credence to the myths of corpse hives who follow the instructions of a banshee, wight, or some other creature.