Vampires
Among all the forbidden rituals that are perpetrated within the Temple of Shy’og, there is one hidden in its darkest and most terrible depths where lies the formula for immortality. Hundreds of adventurers have attempted to find this unholy formula, but most have met with death or madness.
The few who succeeded discovered, despite themselves, that their fate turned out to be much more terrible than that of their predecessors. Now they dwell in darkness, unable to sustain sunlight, unable to eat or drink anything but the blood of their kin to ease their suffering. Now they hide in the Temple and there they await the end of the world.