During The Great Jedi Purge, the dark lord vader was ordered to hunt down all remaining jedi that survived order 66. He originaly carried out these first missions in standard black eta 2 actis interceptor. He found this difficult due his new body, so the dark lord drafted a new ship called the TIE Advanced x1 and sent it to Sienar Fleet Systems for construction. While he was waiting for this new breed of starfighter he modified his ETA 2 to include some of the TIE Advanced most useful features and design eliments.