Fortress of bloody stone were ancient, and so were the fields of that spread upon the Nether like butter on bread. There weren't only travelers, there were also, raiders.

Lore:
Ancient ruins and such can be found within the Nether, the tales of great adventures and journies of men who told them were admired and marveled. Though it was also suspected that not all heroes return to the Overworld. Raiders who seek their fame enter the Nether to look for treasures and loot that would be found in fortresses. They pillage, take, and ruin the scapes of the lands. However, we all know the tales of the Travelers, the men who were cursed forever as damned souls. Some raiders encounter these beings, some fight, some flee, some... didn't make it out. Of course some of these raiders would fall victim to the curse aswell, and so they turn into Nether Marauders. These beinhs are some what similar to their Travel bretherin, but lack their other powers, and therefore, create tools and equipment to aid them in survival. They are still raiders in nature, so, they steal what they can from various encampments and other travelers from the overworld, still not letting go of the greed that put them in this curse from the beginning.