C'Thraxxi (singular C'Thrax) are monstrous warbringers that are larger and more resilient than other n'raqi. Possessing great strength and brutal intellect, their dark powers can drive even titan-forged to madness. C'Thraxxi are easily distinguishable from lesser faceless ones by their enormous size and more arthropod-like features.
They seem to usually serve as protectors within places of great importance to the Old Gods, and as commanders and generals of the Old Gods' forces. Warlord Zon'ozz was one of the two faceless generals that led the assault on Wyrmrest Temple during the final battle against Deathwing, the other being Yor'sahj the Unsleeping. C'Thraxxi have extremely potent regenerative abilities. Even after what mortals might consider death, they can still slowly regain their energy and return on their own like Zakajz did, or because of blood rituals such as those that awakened Kith'ix.