Fleshstone is a category of hellrock that is a naturally occurring organic substance. Some types seem to be made purely of muscle and skin, while other variations have been discovered with bones and organs. Most fleshstone can bleed.
The 14th century explorer Charon reported finding a brain embedded in one such fleshstone wall, though he gave no indication as to its possible sentience. More recent reports have confirmed beating hearts which actually pump blood as well as lungs, mouths, and eyes. In two known cases presented by Huginn the lungs and mouth were connected and actually respirating.
Because of this, Kent once posited such organs as one of the possible causes of Hellsong.
When damaged, fleshstone repairs itself similarly to normal human tissue—including scabbing scarring—and all at a faster rate than other types of hellrock. When destroyed there is no guarantee that a brick of the substance containing one organ or bone will re-grow identically. Fleshstone with organs tends to re-grow with organs and fleshstone with only skin and muscle tends to re-grow with only skin and muscle, though this is not always the case.
It has been demonstrated that fleshstone bricks, when spoken to, consistently heal faster. It is possible that this flesh, like ours, is affected by the attitude of nearby souls. Some have speculated that the emotions of proximate sentences affect the substance in the same way that those emotions affect our own flesh. However it is important to note that fleshstone located near rivers also heals more quickly, and that physical vibrations, not emotion, are most likely the efficient cause for the increased rate of healing. If this is indeed the case, it should be noted that human beings made a similar mistake on Earth while measuring the effect speaking had on plant growth.
When ground down, fleshstone is indistinguishable from human tissue. Blood drawn from the substance, if of the right type, is usable for medical relief. It is perhaps for this reason that consuming this type of hellrock is considered distasteful, although there appears to be no actual adverse effect from doing so. Since it re-grows at a substantial rate, fleshstone works well as a food supply.
The lack of fleshstone in most of today’s populated sections is thought to have been caused by the Rustrock Purges performed by the Christian Iconoclasts in the 16th century. As the substance is often found as the feeding base for hordes and swarms, their efforts may have had a positive effect on human survival, even while negatively affecting the food supply.
Fleshstone is affected by corpsedust in a way that no other hellrock is. When damaged and exposed to corpses and corpsedust, this type of hellrock may heal to be undead, or to be a hybrid of dead and undead. As with its organic cousin, corpsestone when ground down is indistinguishable from a corpse’s flesh.
Corpses have been known to attack and pollute fleshstone, sometimes being unable to distinguish the substance from an actual human being. This is thought to explain why swarms and hordes fed on this type of hellrock are more likely to act adversely to corpses than other devils.
One recommended way of dealing with such a swarm is to spread corpsedust on the fleshstone they consume. The flesh will re-grow as corpsestone, removing the swarm’s food supply. This is not optimally used on hordes, as the hordes will zombify. Likewise, harpy feathers are recommended for use on hordes, but not on swarms.
Fleshstone is considered to have a hardness is 1.7. Like woodstone, its oxidation temperature is lower than its melting temperature. The substance is not usually recommended for alloys except for when used specifically in creating weapons designed for damaging shades.
Bone armor, worn to protect one from shades is, of course, more humanely made from fleshstone.