Complex sentence: With Taarna readying her final attack on the Loc-Nar, it pleads to her not to "sacrifice" herself, she does not relent, and her self-sacrifice destroys the Loc-Nar.
Split into simpler sentences: With Taarna readying her final attack on the Loc-Nar, it pleads to her not to "sacrifice" herself. She does not relent, and her self-sacrifice destroys the Loc-Nar.