The Curse of Llishil
Vermas are the unholy creation of Llishil. The Vermas were first created when Llishil used her power to send out a plague, killing thousands of people overnight. Those killed did not stay dead however, returning not as Llishil had hopped for. Those who resurrected came back as beings, not quite the Revanaunts that Llishil had hopped for, but also not quite zombies either. They were something new and horrible all their own. The Vermas look like whatever race they had once been in life, but twisted into something new as well. They all appear with the wounds that ended them, though they no longer age or decay. Despite this all of them reek of death and decay, and all of them speak Supernal, regardless of their former languages. To date only the Warforged cannot become Vermas when they die, and only those whose corpses are burned avoid becoming Vermas, regardless of how they die.