Yi Xing Long is the seventh and last of the evil Shadow Dragons to appear, and the last villain to appear in Dragon Ball GT. He appears as a large, humanoid, white, black and blue dragon. Two large, fleshy horns emerge from the top of his head, and a pair of tiny feelers emerge from his upper lip, giving the appearance of a mustache. Long black spikes protrude from his shoulders, elbows, back, and knees. Two more fleshy spikes protrude from the sides of his chest, and his abdomen and the back of his head are dark blue. The One-Star Dragon Ball is visible on his forehead, sporting the blue color and cracked appearance of all the corrupted balls.
Of the seven Shadow Dragons, Yi Xing Long is the most powerful. Like the others, he was formed by the build-up of negative energy inside the Dragon Balls.
Being born from one of the strongest and most selfless of wishes, Yi Xing Long is the most selfish, uncaring, and evil-hearted of all the Shadow Dragons. He feels no compassion for any form of life, even destroying his fellow Shadow Dragons if it benefits his ultimate goal of universal destruction. He also enjoys belittling his enemies, reminding the heroes that they are to blame for his existence.
He transforms into Omega Shenron after swallowing all seven of the Dragon Balls (this is his special power, rather than having power over elements).
Syn/Omega, the final major villain in the Dragon Ball universe, is associated with the One-Star Dragon Ball. Interestingly, this ball was also associated with Emperor Pilaf, the first major antagonist in the Dragon Ball franchise (and also the one who inadvertently began the events of Dragon Ball GT).
As Omega Shenron, being the dragon of absolute destruction, his brutal personality becomes more pronounced and he becomes intent on destroying everything and everybody that stands in his way. He is nearly invincible in this form and is only outclassed by Super Saiyan 4 Gogeta. He easily beats up Gokuu, Vegeta, Majuub, Gohan, Trunks, and Goten, and nearly managed to destroy the Earth through the mere release of his negative energies. In the end, it took a Spirit Bomb charged with energy throughout the universe to defeat him.
