The Kalkor are one of the only Marguul clans to outright reject the rule of Lhesh Haruuc Shaarat'kor and Darguun. Led by Morgaath, the Kalkor is not the largest of the Marguul clans, but are nevertheless the most aggressive. They are worshipers of The Mockery, and will attack anyone they find travelling through the Seawall Mountains, especially travellers displaying the insignia of Haruuc or the Rhukaan Taash.
The Kalkor distinguish themselves from other Marguul clans by carving fang-shaped scars onto their faces.