Dreadlord

Dreadlords, also known in their own language as the Nathrezim, or the Thal'kituun, "the unseen guests", are an ancient and powerful race of Demons who act as the great tacticians of the Burning Legion. Nathrezim are an old race of Demons, if not the first. The Dreadlords were partially responsible for the endless wars of Demons that Sargeras the Defender fought against as a champion of the Titan Pantheon. Since the corruption of Sargeras, the Dreadlords have eagerly assumed a place of honor in his Burning Legion, and are some of the greatest and most powerful Demons to exist.