Terrorguard

Terrorguards, also known as Fiends or Terrorfiends, are a subspecies of the Ered'ruin race of Demons. Related to the Doomguard, Terrorfiends are powerful Demons, possessing much of their powerful forms and spell casting abilities, as well as a passion for war and battle. Terrorfiends possess an unusual physiology by possessing arguably more than one head. In addition to the six-horn crested head upon their shoulders, they also possess a mouth-like cavity in the center of their chests as well as an additional pair of eyes, which can consistently be seen billowing flames. It is unknown which head is the Terrorguard's true head, as both have been seen speaking and interacting. Which head is the true head is a matter of some debate.

Interestingly, Terrorguards also seem to be capable of being named as Doomguard, as powerful Terrorguard such as the mighty Azzinoth were given this rank, suggesting that Doomguard is a rank over a race, and both Terrorguards and Doomguards are part of the same Ered'ruin species.