Complex sentence: During the film's ending, he reappears and reveals his true identity to Bruce as well as Jonathan Crane's silent partner in a plan to disperse a fear-inducing toxin into Gotham's water supplies.
Split into simpler sentences: During the film's ending, he reappears and reveals his true identity to Bruce. Ra's reveals himself as Jonathan Crane's silent partner in a plan to disperse a fear-inducing toxin into Gotham's water supplies.