Complex sentence: However, Batman is able to take him by surprise, hurling both of them into the Fountain; it destroys Sensei due to his impure spirit, but Batman is not only healed, but apparently slightly rejuvenated by his dip in the waters.
Split into simpler sentences: However, Batman is able to take him by surprise, hurling both of them into the Fountain. It destroys Sensei due to his impure spirit, but Batman is not only healed, but apparently slightly rejuvenated by his dip in the waters.