War on Shu-Torun

Following the destruction of both Alderaan by the Galactic Empire and the Death Star by the Rebel Alliance, the Dark Lord of the Sith, Darth Vader, traveled to Shu-Torun. His mission was to reinforce their cooperation in supplying the Empire with ore. There, Lord Vader was invited by Princess Trios, daughter of Shu-Torun's king to a celebration. In truth, the monarch and his children planned to assassinate the Dark Lord.

During the celebration, the King's guards—posing as rebels opposing the Empire and royal house—ambushed the Dark Lord but were cut down by the cyborg. Trios, claiming that the ore-dukes were behind the sudden attack, led Vader into a shaft. Lava came down from the shaft and the Dark Lord carried her. After surving, Trios attempted to shoot Vader, but lost her right hand. During this time, the Emperor's Fist sent his two assassin droids, 0-0-0 and BT-1 to eliminate the King and his two other children, Prince Monthan and Princess Hollian. With the upstart vassal dealt with, Vader gave Trios a small remnant of Alderaan as a reminder of what befell those who stood in the Empire's way and crowned her the new monarch of Shu-Torun.

Following Lord Vader's defeat of Commander Karbin at the battle of Vrogas Vas, the Emperor's Fist was sent by his master, Galactic Emperor Palpatine, to assist Grand General Cassio Tagge and Queen Trios in dealing with the ore-dukes' rebellion.

Upon his arrival to the planet, Vader, accompanied by Doctor Tulon Voidgazer and her drones, enhanced warriors Morit and Aiolin Astarte, assassin droids 0-0-0 and BT-1 as well as his stormtrooper forces joined Queen Trios' forces and began formulating an attack plan against the barons. Vader, Trios and Voidgazer, along with a stormtrooper battalion opted for a show of force and decided to directly assault the delving citadel powering one of the rebelling Dukes' Barony. After arriving at the cave housing the citadel, Voidgazer positioned her drones armed with experimental ordnance in the citadel's flanks, while Vader, his stormtroopers and the Queen led a frontal assault directly against it. With the Citadel's defenses focused on the Imperial forces' direct attack, Voidgazer's drones were able to slip through and detonate directly above it, fragmenting the cave's roof and spilling molten lava on the vehicle permanently disabling it. Although successful, Voidgazer's attack was meant to completely obliterate the vessel, a failure which she attributed to the drones' experimental weapons. The Queen also voiced her concern in regards to the battle's results as each citadel represented a tremendous amount of lost resources as well as a near religious place, but Vader reminded her that the destroyed Citadel would never rebel again.

Vader and the Queen returned to the royal palace, where they met with the rest of their forces including Doctor Cylo, Morit and Aiolin. There, they discussed their options on how to continue the war, with Vader proposing that if the dukes refuse to surrender the Queen's forces continue their attacks on other installations to deprive them of all their wealth and possessions. Trios again voiced her concern with the potential destruction of yet another Delving Citadel, remarking that the very reason the Empire was fighting in the war was their need of the Citadels' mining capabilities and that without them the Empire would never fulfill its material needs. The Dark Lord rebutted her by assuring her that all she had to do was obey his orders, much to the royal staff's amusement. Refusing to let the matter slide, Trios followed Vader outside where she demanded he treat her with the respect her title commanded around her people, else she risked losing her influence on them. Vader reluctantly agreed, on the condition that the Queen would not question his decisions in public either.

Following the Imperial victory on the battle of the Delving Citadel, the ore-dukes retreated on the planetary mantle, where they debated their options for the war. While there, they received a transmission from Vader and Trios including footage of the disabled Citadel and Vader's assurance that if they refused to surrender he would personally assure their destruction. Unfazed, Baron Rubix assured the dukes that without their support the monarch was weak and undefended, as well as that he would personally see to it that the Queen be reminded of the fact.

Queen Trios, Vader and their associates left the Palace shortly after transmitting the broadcast to await the dukes' response in the Shu-Torun Ancestral Retreat, a place sacred in Shu-Torun culture due to the presence of the adamantine shoals in the waters around it. Trios wished to use her time there to reflect on the purpose of the conflict, despite the Astarte twins' objections in regards to the retreat's civilian purposes making it unsuitable during wartime. As Trios, Vader and the twins were discussing in a balcony, Baron Rubix's Lava Leviathan emerged from the water and opened fire at the sacred retreat. Despite Trios' guards urging her to escape aboard a getaway craft, Vader and the Astarte twins hijacked it to attack the Leviathan instead. The Dark Lord and the twins were able to board the magma submersible and make their way to either end by taking out all guards they encountered along the way; after reaching their objectives they cut holes in its hull from the inside and left it to sink into the lava. They then evacuated the retreat along with the Queen.

The incident left the Queen devastated in the thought of the lengths the dukes had went to in order to secure their power and wealth, going as far as to attack and destroy a sacred site, committing what she believed was a "sacrilege" in her people's religion. Upon her and her Imperial allies' return to the Shu-Torun Palace, she was confronted by Chamberlain Jooli, who scolded her for her direct involvement in military engagements instead of focusing on her role as the planet's ceremonial leader. Owing to their previous deal, Vader ignited his lightsaber against the Chamberlain, warning him that his words against the Queen had put him in more danger than the Queen ever was. Upon thanking Vader, the Queen declared that she believed the ore-dukes had made their intent clear and it was finally time to engage in open warfare against them, suggesting Rubix' Citadel as the next in line to be destroyed as a reminder of Imperial power.

Despite the two major victories the Empire had scored against the dukes, Grand General Tagge was ultimately frustrated with the war's progression, remarking to Cylo that although Vader had the ability to win major battles in a relatively short period of time, he lacked the capacity for the strategic planning of small tactical victories that would ultimately win the war. Agreeing, Cylo discussed with Tagge on a plan to eliminate Vader for good, and the scientist contacted the ore-dukes to ask for their assistance. Speaking to them via one of Voidgazer's drones, he assured them that although he could not guarantee their victory in the conflict, he could deliver Vader to their forces so they could eliminate him instead. The dukes, devastated from their recent losses and terrified of Vader's "sorcery," agreed to Cylo's plan and together they set up a trap for the Dark Lord.

Vader, Trios, and Cylo led the Shu-Torun Loyalist/Imperial Delving Fleet, a combined force of Imperial and loyalist combat drills against Rubix's stronghold. Vader had decided that a single, perfectly timed and overwhelmingly powerful attack by the two armies' combined forces would be enough to capture the Citadel and force Duke Rubix to surrender, and had warned his troopers to only attack at his command. As the Imperial drill carrying the stormtrooper units, Vader and the Astarte twins entered the underground, Cylo gave the signal to Voidgazer, who hacked the drill's systems causing it to veer off course and into a lithoporoite stream. As the stream was too thin to support a combat drill's weight, the vehicle instead sank all the way to the lower mantle, eventually settling into the bedrock's stable surface where their forces were surrounded by Rubix's elite troopers. As the craft's propulsion systems were also disabled, the drill was left stranded deep underground, closing Cylo and Rubix's trap. Vader had 0-0-0 and BT-1 activate their hidden droid commandos to attack Rubix's gathered forces from their elevated positions in the drill's higher floors. Despite Vader and the droids successfully pushing the duke's forces to retreat, the drill was surrounded and its passengers were unable to escape it, and when the Dark Lord tried to contact the Queen to inform her of the absence of Rubix's elite in his Citadel and the need for her forces to immediately attack it, he found that his comms were jammed. .

At the same time, in the higher mantle, Cylo ordered Trios to call off the attack due to Vader and his forces' presumed loss. However, the Queen refused and decided to send her troops without the Empire's or her Chancellor Jooli's support. Jooli tried to persuade her of her inability to make critical decisions in a time of emergency, claiming that his role was to hold her reigns in her father's absence. Trios, tired of Jooli doubting her ability to lead Shu-Torun, had her guards execute him, and with the Chancellor dead the monarch finally instructed her troops to attack.

After convincing his stormtrooper forces to hold their position against Rubix's elite to keep them occupied and far from the Citadel, Vader and the twins went into a lava cavern to reach the main fleet, where the Astarte siblings turned on him. Vader fought the twins until Morit pushed Aiolin into the lava to take down his greatest rival and made his escape. Vader then pulled Aiolin out of the lava before she died, and in return she gave the Dark Lord her memory circuits before he put her out of her misery. Vader discovered that Cylo was now in league with Rubix and swiftly rejoined 0-0-0 and his droid forces, to find the ore-dukes' forces surrendering to them. With all opposition finally cleared, Vader and the droids hijacked Rubix's drills and rejoined the Queen's forces on Rubix's delving citadel. Despite being shot, the Queen continued to fiercely lead her troops as the Empire arrived. Rubix, having lost contact with Cylo, spoke with his daughter Bixene about his men submitting to Vader. As the Baron and his daughter made their escape, they were confronted by the Dark Lord who demanded his immediate surrender. Rubix surrendered to and offered his citadel to Trios and recognized her as Queen. However, the monarch, angry for the deaths of thousands of the Baron's hand, ordered his execution.

Trios then gave Bixen the title of Baroness and told her to bid the remaining rebels to make peace. The Queen assured that she would deal with the remaining ore-dukes, but their lines would continue. Vader left Shu-Torun, but left behind a stormtrooper captain to act as Trios' advisor. Due to assisting Rubix, Cylo and his abominations fled. They would later attempt to hijack a new Super Star Destroyer, the Executor, but were ultimately vanquished by the Dark Lord.

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• Star Wars: The Rise and Fall of the Galactic Empire