Xu Fu looked at Sun Yan and said, "But the box is very large, and simply sealing it off can't completely isolate those long-lived beings. Their infiltration into the box still continues in secret. The Tomb Guardian is a method left by short-lived beings inside the box, allowing more short-lived beings to become its protectors, using these Guardians to deal with the long-lived beings trying to infiltrate the box."
After hearing what Xu Fu said, a name instantly flashed in Sun Yan's mind—Extraterrestrial Demons.
He remembered when he went to San Francisco to find the Ruyi Golden Cudgel, he encountered Klein, who was also a Tomb Guardian.
At that time, he was plotting to summon the 'Ancient Gods.' Now, comparing Xu Fu's information, Sun Yan suddenly realized.
That so-called Ancient Gods of the Cosmic Radiance seems to be the long-lived beings outside the box, no wonder they're referred to as Extraterrestrial Demons.
