The Curseblood Goblins, despite their goblin-like appearance, are not actually Goblins. They are the result of a man-made disease called Goblin Pox, created by the necromancer Karlt Corvell. Goblin Pox was specifically designed to infect Goblins and swiftly bring about their demise. And it was highly successful. Karlt wiped out over two hundred Goblins in less than a week, all members of the same tribe.
However, the surviving members of the tribe turned the tables on Karlt. They launched a surprise attack on the necromancer, catching him off guard and ultimately ending his life. During their confrontation, the Goblins discovered the remaining vials of Goblin Pox and realized that the disease could also affect non-Goblins.
Though the progression of the disease was slower in non-Goblins, the end result remained the same. After death, the bodies would undergo a transformation, and four days later, they would be reborn as Curseblood Goblins. These cursed creatures bear the marks of the Pox, and their appearance is marked by hideous Pox marked features, sliminess, and an unpleasant odor.
- from the publisher's blurb