Complex sentence: A warrior named shadow who everyone fears rides off to a far off land and see's a deadly looking peak with a demons helmet on it that is the portal called "The Gates Of Shadows" that separe the world of shadow from the demon world.
Split into simpler sentences: A warrior named Shadow whom everyone fears rides off to a far off land and discovers a deadly looking peak with a demon's helmet on it. It is a portal called "The Gates Of Shadows" that separates the world of shadow from the demon world.