Casin Cu Calas or the Triple C were a group of vigilantes made up of humans, elves, and dwarves from the Silver Marches who attacked small orc settlements in and around the Kingdom of Many-Arrows around 1470 DR.
The organization's name came from an elven saying that meant "honor in battle". Non-affiliated elves became upset at the use of this name and took to calling the group the Night Riders instead.
The group operated as a kind of cult, with the leaders donning black and red robes and black hoods to preside over racist chants about killing orcs.
The organization worked in small bands of warriors, who attacked orc homesteads. They beheaded any males they found, and thrust the severed heads on pikes around their camps.