Complex sentence: When Batman is captured and placed in a deadly drinking bird trap, Aquaman comes to his rescue and gets shocked by the Penguin, who reveals that his umbrella drones will spread a paralytic gas over Gotham City.
Split into simpler sentences: When Batman is captured and placed in a deadly drinking bird trap, Aquaman comes to his rescue and gets shocked by Penguin. Penguin reveals that his umbrella drones will spread a paralytic gas over Gotham City.