Complex sentence: Generally, Xellos' mood can be determined by the state of his eyes: if they are closed, he is acting as the "Trickster Priest," but when he opens them, he reveals his dark nature.
Split into simpler sentences: Generally, Xellos' mood can be determined by the state of his eyes. If they are closed, he is acting as the "Trickster Priest," but when he opens them, he reveals his dark nature.