Although at this moment Sword Demon Aatrox was somewhat unhappy, Zu Fen was not a weakling. If Aatrox dared to force Zu Fen, the latter could simply leave without giving him any explanation.
Everyone was also looking at Zu Fen; some understood, but some didn't quite get it.
Zu Fen said, "I can tell you the reason, it's quite simple: in my speculation, the so-called Heaven and Earth Prison was actually set up by someone, rather than naturally occurring. During the Era of the Gods, the strongest Heaven and Earth Prison could tolerate was the Martial God, because a Martial God-level strong individual posed no threat to the one who set up the array. Also, at that time, Earth was a thousand times larger than it is now. The power of Heaven and Earth Prison back then was also immense.
