Complex sentence: Eph, Zack and Mr. Quinlan are killed, but the Master's strain is eradicated forever all the vampires disintegrate, and the remnants of humanity are left to rebuild society.
Split into simpler sentences: Eph, Zack and Mr. Quinlan are killed, but the Master's strain is eradicated forever. All the vampires disintegrate, and the remnants of humanity are left to rebuild society.