As it turned out, on that day, Great Emperor Wang Heng engaged in a battle beyond the realms with three Supremes of the Underworld Clan, while Jiang Chen's true form followed closely behind, leaving his black-robed avatar behind in the military camp of the Silver Dragon Guard.
It was not until Great Emperor Wang Heng defeated those three Underworld Clan Supremes that Jiang Chen's true form finally revealed itself.
However, this also allowed him to see through the bottom line of Great Emperor Wang Heng and acquire the physical bodies of the three Underworld Clan Supremes.
Chapter 219