I have worked iron my whole life, and I can feel when a weapon has twisted away from its purpose. The Blackthorne cult forges tools meant to wound the land as much as flesh. Slay their cultists and bring me what they carry: one of their staves, and a ritual dagger. They do not merely kill with their blades, they are poisoning them with intent. By studying the marks left by their corruption, we can learn how their influence spreads. Perhaps, we will learn how to stop or even reverse it.