Perhaps, that predecessor had already left. He was merely passing by and noticed Jiang Chen's impressive talent. So, he impulsively decided to help Jiang Chen. After that, he left immediately without leaving anything behind.
No, that's not true. He did leave something.
Suddenly, Jiang Chen's expression turned peculiar. For just a moment ago, he found a set of unfamiliar memories emerging in his Sea of Consciousness.
At the same time, something new inexplicably appeared within his Ancestor of Thunder's scepter.
Without the chance to examine these new memories, Jiang Chen quickly sent his divine sense into his Ancestor of Thunder's scepter.
Within the scepter, there was a world formed by countless thunders. As soon as his divine sense entered, he saw an innate divine symbol in the deepest part of the world where all the innate thunders gathered.