Manhua Variant: Name is changed to "Dark Times."
Current age at the time of the story. It is a period characterized by strong monsters and a decline in human civilization. In the past the eras where named after the strongest empire of that time. The Age of Darkness has no such empires.
The Age of Darkness was started when a demon beast broke through to a realm beyond legend rank. When this happened it was felt by the top experts of the day. Three hundred of them attacked it, but all died in failure. In a rage the demon beast commanded its kind to attack humanity, wiping out most of human civilization within a few months. This is known as the demon beast riot and is what started the Age of Darkness.