Exiled from their home this elite military force is adrift in a foriegn land. All these people have ever known is war so they put themselves for sale as mere mercenaries at the same price as any other sword slingers. But these men have brought a new type of type of warfare to the northern lands and the fields of battle will run red with their enemy’s blood.
Time is a never ending cycle in which humans inhabit it for the equivalent of a blink of an eye compared to the infinity that is time. In this recurring age of humans the mysterious Time Knights keep the eternal order which rough chaotic men unwittingly disturb.
Most Vampires get their own feed and don’t care who they get it from. But for the highest Lords of the Vampire hierarchy they have little time to go about the process of obtaining blood and prefer some of a good source, so they get their Quartermasters to take blood of good quaility from important victims.
Not all vampires in the land of the dead are bloodthirsty killers that want to take over the world. Some are satisfied with immortality and want to spend an eternity without strife in seclusion away from contant war with the humans.
Real World: some Indians in the Amazon treat their eyes with a traditional potion applied with palm leaves. Brutally painful, the drug alters vision, giving the jungle's dense green walls greater texture and dimension. You could adapt this to desert or swamps, or other hard to navigate regions.