Complex sentence: Resolving to press on with his quest, Kuja vied for a new source of untapped power to topple his enemies, and found it in Queen Brahne's adopted daughter, Princess Garnet.
Split into simpler sentences: Resolving to press on with his quest, Kuja vied for a new source of untapped power to topple his enemies. He found what was required in Queen Brahne's adopted daughter, Princess Garnet.