In the epic Ming dynasty novel The Creation of the Gods ( Fengshen Yanyi ), Lei Zhenzi stands out as one of the most uniquely born and fiercely loyal heroes to serve under Jiang Ziya during the deification campaign. His name, meaning “Thunderclap Son” or “Son of Thunder,” reflects his extraordinary origins and his destiny tied to the forces of thunder and lightning.
Lei Zhenzi is not born of woman in the traditional sense. He is discovered as a mysterious, thunderous infant inside a tomb after a violent storm. The immortal master Yun Zhongzi finds the child, wrapped in a bolt of lightning and crying like rolling thunder. Recognizing his divine nature, Yun Zhongzi takes him in as a disciple, names him Lei Zhenzi, and raises him on the sacred mountain.
Lei Zhenzi fights on the side of King Wu of Zhou against the tyrannical King Zhou of Shang. Though not the mightiest in direct combat against top-tier immortals, his aerial mobility proves invaluable for scouting, surprise attacks, and breaking siege stalemates. He is fiercely loyal to his adoptive father and to Jiang Ziya, never wavering in his duty despite his brutish appearance. His sense of justice is as quick and unyielding as the lightning he commands.
After the successful overthrow of the Shang dynasty and the conferring of deities, Lei Zhenzi is not among the gods listed on the Investiture Altar — a rare fate for major characters. Instead, because he was already of divine essence and had never been a mortal official, he returns to the mountains to continue his cultivation. In some versions, he is later worshipped as a minor thunder deity or an immortal guardian, his body and spirit remaining free of the bureaucratic hierarchy of heaven.