Cleon
Legend
How's this:
Beings from far-off planes of horror, darksiders are fear incarnate. They exist only to strike terror in sentient beings, and have no interest in treasure or power unless it can be used to foster fear. Darksiders are solitary entities, but may form alliances with powerful evil beings if it helps the darksiders' aims. Few mortal creatures can tolerate the terror of a darksider's presence, so such associations are usually with fiends, undead and other fearless beings. A darksider is a "connoisseur of fear", and savors slowly tormenting its victims as much as it does feeding off their will.
COMBAT
Darksiders try to remain invisible at all times. They prefer to communicate via an illusion they create (which also serves as a decoy to deflect attacks). If a darksider encounters intelligent creatures, it normally attacks with its nightmare projection power, slowly whittling its opponents down from a safe distance until they die of Wisdom drain. A darksider falls back to its touch attack if cornered and unable to escape.
If a darksider encounters sapient beings and does not attack, this usually means it wishes to involve those beings in some elaborate plot that will result in far more fear and suffering than the darksider would achieve by simply tormenting them to death - although it will likely try to impose that fate upon its patsies once their usefulness is over.