This should be the Millennium Thunder Copper that Xiang Zhao mentioned.
In the same instant, a thunder dragon that lit up half of the sky suddenly crashed down, most of the thunder light pouring onto the purple-black metal.
In the blink of an eye, the thunder light entwined, and this Millennium Thunder Copper became exceptionally bright, almost transparent, wrapped both inside and outside by countless thunder lights that lingered long.
The thunder light dispersed, but the thunder light swirling around this Millennium Purple Copper continued to flash.
In the next moment, lightning arose from all directions, with heavenly thunder naturally striking toward all sides.
Meanwhile, Xu Jin's divine thought of the Mingji Star Pattern also touched this Millennium Thunder Copper, and the internal aura was extremely complex, containing vast amounts of thunder aura.
But at this moment, there was suddenly an inexplicable fluctuation of power inside this Millennium Thunder Copper.
