Kastighur

Kastighurs were tanar'ri demons found in the Abyss or the Barrens of Doom and Despair. Wicked and sadistic, kastighurs acted as prison wardens and hunters among demonkind. They teleported around the field of battle and used their devastating charges to stun and horrify their enemies.

Description
Kastighurs were huge, standing somewhere between tall and weighing up to, although ancient, veteran kastighurs could grow to greater, truly gargantuan sizes. They were roughly humanoid in form, with tough hides that rippling with muscles and powerful legs ending in cloven hooves. The hideous creatures had massive heads bearing long horns that grew slowly but continually. Kastighurs enjoyed both filing their horns and carving words or other symbols into them.

Kastighur "wore" armor of a fashion — enormous steel pieces usually bolted directly to their bodies. Giant steel helms were bolted to their necks, hiding most of their heads, and magical breastplates were, if not bolted, at least fastened to the torsos.

Personality
Depraved and cruel, kastighurs were driven by their fiendish impulses. They were brutish and not particularly bright, usually wandering the Abyss to hunt and kill at random if left to their own whims, their victims ranging from the souls of the damned to other kastighurs. The most powerful of the demons sought to enslave and torment the mightiest creatures, including other powerful outsiders, dangerous mortals, and dragons. The most delightful activity for kastighurs was breaking the wills of their victims, whether by physically torturing them or incessantly hunting them down.

Abilities
As a tanar'ri demon, the kastighur shared many of the same traits and abilities, but with some differences. In particular, it was immune to acids, but lacked the ability to summon other demons and use greater teleport. Instead, the kastighur could only use teleport, but this was limited by range and had a risk of going awry. In return, three times a day, a kastighur could teleport in the blink of an eye to surprise victims. It could also use feather fall at will, which was a boon at those times it teleported too high into the air.

The kastighur had a terrifying aura whenever it charged or attacked and, in turn, the kastighur grew more aggressive against fearful opponents.

It used its strong arms to slam foes, and its long horns allowed it to gore its victims. The kastighur trained to charge, knock over, and overrun its enemies, and to deliver wild, brutal attacks. A gore attack inflicted on a charge could leave a foe stunned, if they still lived.

Kastighurs were also skilled trackers and hunters, on the planes and above and below ground. They had keen senses, and could even track prey by scent.

Combat
Kastighurs had a great love for melee combat and took to battle with great joy.

A kastighur charged its enemies as often as it was able, attempting to stun and then rain deadly blows upon them. Combat started with the kastighur charging its target, stopping at the limit of its swing (15 feet or 4.6 meters). If the target was stunned, then the demon would make another charge, closing the gap between kastighur and victim. In close melee, it would go all-out, goring, slamming and dealing out catastrophic injuries at full force.

In battle, it would sometimes use a quickened teleport to appear closer to a target so it could charge it. They were so battle-hungry they would even try to teleport above a flying target, to then try to grapple it and take it down to the ground as they fell.

As a kastighur took to the field of battle so quickly, it rarely had time to become familiar with the battleground and thus attempted to keep its teleports as close as possible. Kastighurs used their teleporting ability with a bit of trepidation because they didn't enjoy the same greater teleport that many other fiends possessed.

In battle, kastighur units regularly broke ranks to pursue enemies who appeared frightened or fleeing.

Society
Kastighurs normally served more powerful and intelligent demons than themselves as jailers and hunters, tasks they found quite fulfilling. When a tanar'ri needed to track down a creature but lacked the ability to create a retriever, they called upon one or two kastighurs instead. However, a kastighur's appetites and impulsiveness could make them unreliable and frustrating to work with. They might intentionally let creatures escape just for the fun of hunting them down, and could get distracted when hunting, killing anything in their path rather than focusing on their actual quarry.

Kastighurs also despised others of their kind, seeing them as competition for the attention of more powerful creatures (such as great demon lords and generals) that could take them to new places for hunting. In the Barrens of Doom and Despair for example, kastighurs competed to serve the goddesses Loviatar and Talona, the Lady of Pain and Lady of Poison respectively. Kastighurs put aside their mutual hatred when two or more worked for the same master, but still considered each other rivals and constantly tried to outdo each other in feats of battle.

Kastighurs preferred to travel light, and what riches they found usually went to their masters, so they were not wealthy. However, they looked for magical items that granted other ways to move, such as the ability to burrow in the ground, climb with ease, or fly.

Aside from demons, kastighurs might team up with those capable of causing fear (such as red dragons) or those that could provide them with ranged support, flying allies being particularly useful.

Summoning
Kastighurs, unlike many other demons, lacked a reliable means of traveling to other planes, and so were dependent on other demons or magic items to get them to Prime Material plane, items able to do so (such as those that granted plane shift) being especially prized by them. They enjoyed that hunting ground due to all the suffering they could savor when summoned there, which was normally done by powerful evil spellcasters using gate or greater planar ally spells, including the likes of Fzoul Chembryl, Larloch, and Manshoon on Toril.

Biology
Like many other fiends, kastighurs didn't need to feed or drink—at least not in the same way as most mortal races. Instead, they fed off the fear, panic, and hopelessness of the creatures they hunted or imprisoned. They took great joy in the hunting and torturing of others, prolonging their deaths as long as possible so they could savor the delicious emotions a little longer.