"With the full power of the Dark Side at his command, he planned to lead an army of twisted clones in a bid for galactic conquest. As his brother, it was my sworn duty to stop him. Once and for all."
About this creation
X1 was a Force-sensitive Clone Trooper who had been cloned from the DNA of Jedi Knight Falon Grey.
Along with his brother, X2, the two participated in many key battles during the Clone Wars beside their Jedi General Ferroda. When Order 66 was issued the two brothers killed Ferroda but X2 felt it was wrong.
While X2 later defected to the Rebellion X1 remained with the Emperor where he learned of his heritidge and began training as a Dark Jedi, going on to kill Falon Grey, his genetic father.
The two brothers met and dueled many times but both survived the end of the Galactic Civil War. After the Emperor's destruction X1 proclaimed himself a SIth and remained a large threat to the Galaxy. At one point he kidnapped Luke Skywalker and X2 was sent to rescue the new Grand Master.
In one final battle X1 and X2 fought each other, but X2 proved to be stronger and defeated his brother. When X2 refused to kill his brother, X1 used the Force to try to stab X2 in the back with his blade. But X2 evaded the attack and X1 was killed by his own weapon.