Omega Shenron
Omega Shenron is the form Syn Shenron takes after he absorbs the other six Dragon Balls and corrupts them with his negative energy. In this state, the One-Star Dragon Ball moves from his forehead to his chest, surrounded by the other six Dragon Balls. The spikes on his body become even longer than before (most noticeably on his elbows), and he develops even more on different parts of his body, including his knuckles and feet. His horns also move closer together, with a narrower angle between them.
Omega Shenron gains the abilities of all the other Shadow Dragons, as well as a massive general power increase. Omega Shenron can also take this form with less than seven Dragon Balls-such as when Goku eats the Four-Star Dragon Ball, but he is somewhat weaker and only possesses the powers of the Shadow Dragons whose Dragon Balls he did manage to absorb.
As Omega Shenron, his brutal personality becomes more pronounced, and he is intent on destroying everything and everybody that stands in his way, being the dragon of absolute destruction. He is nearly invincible in this form and is only outclassed by the fusion of Super Saiyan 4 Goku and Super Saiyan 4 Vegeta, Super Saiyan 4 Gogeta. He easily beats up Goku, 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 from the whole universe to defeat him.
Omega Shenron in BT3
Omega Shenron's death