Those who gaze into Balor's evil eye all perish instantly. Therefore, he wears a mask at all times to contain its evil. His body is etched with incantations to bind the infernal power.
Balor is a name from the Irish mythology. He was King of the Fomorians a race of giants. Some stories say that he had one eye in his forehead and one on the back of his head, so nobody could sneak up to him from behind. Other stories tells us that, when Balor would open his third eye on his forehead, everyone who would look into his eye would die instantly.