An Jing was not hearing the name Evil Demon Hundred Kings for the first time. The first time was when Haotian Mirror conversed with Subdue Evil.
An Jing knew that the army of the Evil Demon Hundred Kings was the very force pressing upon Embracing the Void and the other numerous Great Realms' demon armies.
One of the Evil Demon Hundred Kings, Demon Tian Shanyu Minggala, who had attacked the Tianyuan Realm in past years, was the Supreme True Demon Lord. The Holy Demon behind this Holy Demon's Son should be one of Minggala's subordinates, who theoretically required devouring a realm's Heavenly Dao to take form as a true 'Heavenly Dao Demon.'
