Chaos Root Abyss

In order to start Chaos Root Abyss, one must be level 180 and also have completed each of the normal Root Abyss bosses 10 times each. To check this one can try and enter any of the Chaos Root Abyss bosses located on Ch 14, 15, or 16 and they will either be prompted with a message saying they cannot enter or they will enter just fine. Do not worry as you can enter as many times as you want unless the boss is defeated.