Wu Xing Long

五星龍

Wu Xing Long is one of the seven Shadow Dragons and the second opponent faced by Gokuu and Pan. He serves as the dragon of the Five-Star Dragon Ball and embodies the element of electricity.
Wu Xing Long originated from the negative energy generated by the excessive use of the Dragon Balls. He was specifically created from the wish Master Roshi made to resurrect Gokuu, enabling Gokuu to battle the invading Saiyans Nappa and Vegeta (both Gokuu and Wu Xing Long have acknowledged that they are somewhat like brothers).