Darth Ruin (LOTF)

Darth Ruin, born as Phanius, was an Umbaran Dark Lord of the Sith who served the and established the Shadow Assassins on Umbara. Generations later, the current leader of the Shadow Assassins, Varad Zagg, used the Binding to resurrect Ruin into the body of Xux. However, the ritual was not carried out properly, and Ruin had been dead for so long that upon resurrection he immediately went insane and ran away. He was slain a second time on by Ganner Slarwalker. Due to his soul being Bound to Xux, when Xux was killed, his soul was destroyed in a fate considered to be worse than death.