Complex sentence: Aegwynn, known as the Matriarch of Tirisfal, was the penultimate Guardian of Tirisfal: the single mortal champion imbued with the magic of a secret council who would utilize their collective powers in order to fight a never-ending secret war against the Legion.
Split into simpler sentences: Aegwynn, known as the Matriarch of Tirisfal, was the penultimate Guardian of Tirisfal. She is the single mortal champion imbued with the magic of a secret council who would utilize their collective powers to fight a never-ending secret war against the Legion.