sentences:  Holed up in their defenses, the immortals theorise that the presence of standing water has triggered an instinct to breed.Jant returns to the palace to inform the Emperor San of the threat.To the astonishment of all, the Emperor orders all the armies of the Fourlands to be called into action, and prepares to leave the palace to go to the front - an event said to mean that the end of the world is approaching.