Complex sentence: For vampires in general, daylight does not cause them to burst into flames, but makes them progressively weaker; garlic, holy water and crucifixes are useless; and they cannot turn into a bat.
Split into simpler sentences: For vampires in general, daylight does not cause them to burst into flames, but makes them progressively weaker. Garlic, holy water and crucifixes are useless against vampires, and they cannot turn into a bat.