Complex sentence: Peach, Bowser, and Luigi reappear and use the Pure Hearts to destroy Blumiere's defenses, before they defeat Blumiere, but fail to halt The Void's destruction.
Split into simpler sentences: Peach, Bowser, and Luigi reappear and use the Pure Hearts to destroy Blumiere's defenses. They then proceed to defeat Blumiere, but fail to halt The Void's destruction.