Many weird and dangerous spirits haunt The Field of 10,000 Skulls and one of the most unusual is the Barbed Arms. Many fortifications were set up at various times upon that accursed field and eventually barbed wire was invented and many lost their lives impaled upon it. Eventually when enough blood had soaked the wire, when a patch of it was hit by one two many random spells the multiple souls of those who had died on it possessed a large section and animated it.
The wire pulled loose and dug deeply into the earth, moving through it like worms and coming out without warning to bind and strangle individual soldiers. Because of the way it was formed it acquired a hatred of soldiers and mercenaries and decided to kill as many as it could until there was peace in the valley.
Over time it acquired a better way of killing, staying underground and slowly, magically, affecting the minds of the soldiers and mercenaries that were its favoured prey. First it would wake them screaming from their slumbers with terrifying dreams of bloodshed and death.
Then when they were almost too tired to stand it would reach into their minds and turn them against each other, bringing up quarrels that already existed and magnifying them to an unhealthy degree until those affected turn on and kill each other, and then it would attack and kill any survivors. It will not kill babies or children or the very old, but anybody else it finds, certainly with weapons, it tends to think of as a target and it is very hard to convince it otherwise.
If someone who was armed did somehow manage to convince the Barbed Arms that he was not one of those it hated, at the very least it would want to take and destroy his or her weapon.
The Barbed Arms is devilishly difficult to kill. To do so, one must cut it to pieces with a sharp edged weapon, as blunt weapons will not affect it. Magical weapons will obviously do more damage. Should enough of it be broken into small trembling pieces, what is left will go underground out of reach and crawl away, where it magically heals and reforms itself over a period of a few days. If a cleric were to find a way to placate the spirits inside it, and open a way to the afterlife for them, then the spirits would leave it and all that would be left would be a large, partly underground, mass of barbed wire.
It cannot leave the Valley, kept there by the same unearthly force that keeps the other spirits confined within.
OOC-If a GM was playing a game set in World War One or indeed World War Two, this would make a worthy opponent. I got the idea from a film called "Deathwatch." To simulate it’s mental attack all the affected PCs should take a sanity roll and any who fail it will be driven crazy and attack their friends. An observant PC may see it watching in ambush as to *see* it must have pieces of it above the surface and he or she may see it twitching when there is no wind.