Mission to Exegol

Supreme Leader Victor Nevarez went on a mission to find the hidden Torvivum Zuskelgar; who was the ancient evil ruler of the Empire of Darkness, the instigator of the Kids' Club War and possiblly the sole creator of Sheev Palpatine; who is actually a clone vessel that had been modeled on the Dark Emperor's original body, after he heard his transmission that was broadcasted across the entire multiverse.

In search of Zuskelgar, Victor traveled to Mustafar in search of a wayfinder to pinpoint the Dark Emperor's location, while being accompanied by Lord Commander Reginar Albrecht and General Vincent Turner. He killed the locals who attacked him there.

Upon arriving on Exegol, Nevarez left the Hammerhead; an Upsilon-class command shuttle, and activated his Darksaber straight away, walking into the huge Sith Citadel. Upon arriving inside, Torvivum began speaking to him. Victor walked past a tank with a body of a Palpatine clone in it. Zuskelgar revealed that he created Palpatine as a means to groom Anakin Skywalker as Darth Vader and was manipulating everything behind the scene. He then eventually instructed Nevarez to kill Alexander Pepper because he was the boy that sought to defeat the Coalition and his death would deal a crippling blow to the Grand Alliance.

When Nevarez asked him why he should comply, Torvivum said it was because the Coalition of the Red Star needed his Immortal Armada, which he had been hiding under the ice in Exegol for thousands of years as Zuskelgar began to transfer his spirit into the body of the Supreme Leader, completely possessing him and thus fully replacing the latter's once honorable personality with a much more sinistrous persona.

Trivia

 * This was inspired by this: https://star-wars-canon.fandom.com/wiki/Mission_to_Exegol