Cataclysms of the Known World
When the town of Kiris Dahn was at the pinnacle of its power, its wealth and prosperity made it a target for nearby settlements and thieves. To guard against any invasion by powerful forces, the then-ruler of Kiris Dahn sought out tiefling weaponsmiths known as the Architects of Victory, who were experts at deadly magic passed down from the last days of Bael Turath. For a hefty price, they created a set of magic weapons capable of slaying Kiris Dahn’s enemies. They placed a limit on the weapons, though, to ensure that they would be used for their stated purpose and couldn’t be used against the tieflings. The items worked only in and near the town of Kiris Dahn.
Many decades have passed since the creation of the slaying stones. The rulers of Kiris Dahn originally commissioned nine stones (though Kiris Alkirk and his parents believed there were only eight). Seven of these were used to slay leaders of various invading forces, and one was stolen by a courtier and used in an aborted attempt at a coup.