Complex sentence: He is then extorted as a'warrior-hero', in other words, he must fight evil on behalf of Randalf, who has in turn been contracted by the ruler of Muddle Earth, the Horned Baron.
Split into simpler sentences: He is then extorted as a'warrior-hero'. In other words, he must fight evil on behalf of Randalf, who has in turn been contracted by the ruler of Muddle Earth, the Horned Baron.