Complex sentence: Faust is the protagonist of a classic German legend; a highly successful scholar but one dissatisfied with his life who makes a pact with the Devil, exchanging his soul for unlimited knowledge and worldly pleasures.
Split into simpler sentences: Faust is the protagonist of a classic German legend. He is a scholar who is highly successful yet dissatisfied with his life, so he makes a pact with the Devil, exchanging his soul for unlimited knowledge and worldly pleasures.