"...one of the Ancient Evils, and is so old that no one truly remembers where it was he came from, not even himself."
"...he is completely faceless, without eyes, ears, nose, or mouth."
"...he never sleeps but continually is on the move, as though his life is dependent on it. Like a cat, he doesn’t kill right away, but enjoys playing games – mostly of the psychological sort to reduce his victims to a paranoid state that drives everyone away from them - with his victims and kills in elaborate, sadistic and imaginative ways. It is said that if he is after you, you are doomed."
He has no temper to speak of, and it is this lack of emotion that makes a dangerous foe, for his judgment is never clouded.
Before the coming of Balor, he was rarely seen as an object of fear and legend. He had fought against Connacht a thousand years prior. Connacht became the only man he ever feared, for only Connacht discovered his true name and was able to nearly destroy him. When Connacht returned as Balor, he used the name to force the Faceless Man into a life of service to him.
Perhaps The Faceless Man and the Faceless Terror Moagim were one in the same but given that Moagim was placed in a urn, this is probably not the case.
Under the guise of Moagim2, the Faceless Man was invincible from an item known as "The Rod of the Callieach." The Faceless Man was great at hand to hand combat as well. Moagim2 could teleport and cast a Void spell that created a black hole that sucked opponents into it and ripped them apart.