Arthas Mentallis was a Jedi Knight who fought during the Clone Wars. He led an attack against the Sith ship Might of the Sith commanded by Gangru Morpir and he barely survived the mission, striking down Sith Lady Darth Verona before she could destroy the whole ship. He escaped but the dark side energies consumed him and he plotted to kill Count Dooku himself, threatening to tip the tide of war further into darkness. After spending a year under guard in the Jedi Temple and on the verge of madness, Arthas escaped and met with Deva Padj on Ossus, who gave him a talisman that would give him greater power. However, he was unaware that the talisman was fashioned by Darth Verona and he was soon under her control and he headed to the Maw where a Separatist fleet had trapped the rebel forces of Arl