Complex sentence: The player must then find the Precursor's "Primary Containment Facility" which holds the Sea Emperor the bigest creature in the game a thousand-year-old creature that contains an enzyme to cure Carar.
Split into simpler sentences: The player must then find the Precursor's "Primary Containment Facility" which holds the Sea Emperor, the bigest creature in the game. It is a thousand-year-old creature that contains an enzyme to cure Carar.