C444 I'm like a Pearl in the Night

Zuo Zhentian had absolute confidence in himself, and being called "Zi Wang" was not just a random term, because he was born with the [Innate] lightning star body and had an absolute compatibility with the Strength of Thunder. This was also the reason why he possessed such strength at such a young age.

The so-called Upper Sky Thunder Star was a body that was born with thunder energy