From his newfound Terror friend, Arad had learned several things about the labyrinth that he couldn't have found out without her help. The first thing is that the labyrinth had existed for over three thousand years, albeit that the world only stabilized in the past few centuries. That time was just a chaotic mess of fire and storms where only Terrors could survive.
Arad had noticed before coming into the labyrinth that time flew differently inside. If he was right, every minute inside the labyrinth is a second outside, making the time shift 1/60. That means that for three thousand years to pass inside the labyrinth, fifty years had to pass outside.
