Black Star Dragon Character Facts

Ultimate Shenron is the third out of four eternal dragons introduced in Dragon Ball. Like Shenron and Porunga, he can only be summoned using a particular collection of Dragon Balls, the Black Star Dragon Balls in this case.
Like the original incarnation of Shenron, Ultimate Shenron is only capable of granting a single wish. However, his capabilities greatly outclass those of the other eternal dragons. For instance, death wishes do not exceed Ultimate Shenron's power. After a wish has been granted by the dragon, the Black Star Dragon Balls are catapulted throughout the galaxy rather than their respective planet, and a one-year countdown is issued for the host planet's destruction, which can only be undone if the Dragon Balls are returned to that planet within this time.