No one knows where they came from and what they want but all everyone knows is that they are malicious, monstrous, numerous, and relentless. Everywhere the go death and destruction follows them as they lay waste to numerous civilizations over the years. Their evil could rival that, if not surpass, of demons as those who suffer under their touch pray for death. No one knows their true name but all have learned to call them by one name.
The Malum Turba, the Evil Horde.
If one were to see these creatures they would mistake them for demons of some kind and that description would be quite accurate but unfortunately these creatures were part of the natural world. The have the Hideous and Monstrous forms of demons while coming in a variety of shapes, sizes, and colors. The only common features shared among the Malum are Crimson crystal-like bone that protrudes from their bodies (mostly their head and claws), black/red like ichor that acts as their blood, and dark magics. The Malum have a harder physiology that allows them to survive most injuries, healing wounds in a short amount of time, and regenerate limbs in a matter of days. The Malum Turba reproduces through either tainting a "lesser" species or through a special Malums known as the dark mothers which are Malums capable of spawn 50 Liolham at a time.
From what spies have been able to gather and scholars have been able to decipher, the Malum Turba follow are hierarchal caste system based on power and fear. There are four caste that make up the structure of Malum Turba; the Liolham, the Dianuhr, the Dreedach, and Qianach. The Liolham are the lowest class of the Malum consisting of weaker Malum creatures and captured slave while also being the most numerous of the Horde. The main purpose of the Liolham is to be both the labor force, building must of the horde's infrastructure, and the cannon fodder for the horde's armies. Next, is the Dianuhr caste which is the main warrior caste of the horde and its second most numerous of the Malum. Those born/reach the Dianuhr are strong warriors with some being able to use dark magic and are the backbone of the Horde's armies as majority of the cast does the fighting. Then, there is the Dreedach which are Dianuhr who have reason above their peers to become leaders of the horde and are the elite among the rest of the Malum. The Dreedach are the smallest cast among the Malum do to numerous reasons; very few Dianuhr are able to reach this level but make up for it by being smarter, faster, stronger, and magically inclined than the average Malum. Finally, the Qianarch caste is the ruling caste of the entire Malum Turba and is the smallest of the Malum Turba as only one Malum can be Qianarch. The only way to become Qianarch is for a Dreedach to rise above his peers by any means necessary and once a Dreedach becomes Qianarch, they become the closest thing to a god for the Malum.
The architecture of the Malum Turba is gothic in appearance and is made of stone and steel. Malum use the skulls of their enemies as trophies, ritual material, and decorations for places of importance or armor. Lesser Malum worship their Qainarchs as God-like beings while the Dreedach are seen as priest or apostles which in itself is hypocritical as the Malum Turba view the gods and demons as lesser creatures.
When a Qainarch has finally ascended to power in the Malum Turba they initiate what the entire world calls as the Black Crusade in which the Malum Turba launchs a full-scale invasion against the world. Fortunately, Black Crusades a far and few in between because when the Qianarch (and hopefully several Dreedach) are killed during the Crusade the whole Malum Turba falls into infighting as the Malum society depends on gaining power. So far, there has only been four Black Crusades throughout history and civilizations have signed a treaty in which all conflict between them will cease when a Black Crusade begins.