Complex sentence: The senior agent reveals that he has researched the legend of the Imoogi, and attempts to kill Sarah so that Buraki and his army would depart for another five centuries, but the junior agent kills his partner and gives the fugitives his car whereby to escape.
Split into simpler sentences: The senior agent reveals that he has researched the legend of the Imoogi, and attempts to kill Sarah so that Buraki and his army would depart for another five centuries. The junior agent then kills his partner and gives the fugitives his car whereby to escape.