Complex sentence: Hades is the God of the Underworld who is the primary antagonist of', having resurrected Medusa and orchestrated various events for his ultimate scheme to absorb the souls of the departed to increase his power.
Split into simpler sentences: Hades is the God of the Underworld who is the primary antagonist of'. He was the one who resurrected Medusa and orchestrated various events for his ultimate scheme to absorb the souls of the departed to increase his power.