Operation Emperor's Spear was a tactic utilized by New Republic General Wedge Antilles during the Siege of Borlieas in the Yuuzhan Vong War against the legendary former Warmaster Czulkang Lah. Due to the extensive damage the Executor Class Star Dreadnought Lusankya had suffered during the siege as a result of around the chrono coralskipper attacks over multiple months Wedge decided that the Super Star Destroyer would be used in a kamikaze mission against the Domain Hul worldship. Domain Hul served as the flagship of Czulkang Lah and commanded all Yuuzhan Vong forces in the Pyria system besieging the New Republic at Borleias.

The plan involved secretly installing a giant reinforced lance into the center of Lusankya, filling it with explosives and then ramming the ship into the worldship to deprive the Vong of their commander as well as punch a hole the defenders could evacuate through from the encircling Vong forces. While Commander Eldo Davip maneuvered Lusankya out to fulfil her final mission, feints involving a phased rearguard on the ground at Borleias, Remote controlled missiles mocked up to mimic the gravitation signatures of prime targets of the Vong like Jaina Solo and the Millennium Falcon and automated Pipe Fighters from the fake Starlancer Superweapon project would draw off Vong forces, allowing for the successful evacuation of Borleias.

Lusankya had almost all of its remaining functional weaponry removed subtly and was systematically stripped of any parts and power that weren't required to protect and power the shields and engines. The weaponry and parts were transferred and installed on all the other vessels in the Third Fleet as both a means of keeping them at peak operational efficiency and even creating surprises for the Vong by fully equipping the previously lightly armed ImpStar Duece Errant Venture. This paid dividends as Wedge had relied heavily upon Lusankya as his main deterrent for Vong capital ships and ground forces, while creating the illusion through his overuse of the Super Star Destroyer that his other forces were too damaged and weakened, leading to multiple instances of Vong Capital ships being taken by surprise and destroyed when moving to engage what they believed were battered and under equipped support craft.

With Borleias finally taken on the ground, the Starlancer Pipefighters destroyed without seeming resistance, and the multiple sightings of their primary targets in different areas at the same time, all as the Lusankya approached his flagship, Czulkang grasped the enemy plan in its entirety, but when he attempted to retreat, several of the Dovin Basals-pursuing what the biots believed were Jaina Solo interfered with the attempt to exit the system. The New Republic forces likewise employed the Mon Mothma, a Star Destroyer with gravity wells to trap the Domain Hul worldship. With his forces divided occupying Borleias, attacking the false superweapon, and chasing phantom Jaina's due to his son, Warmaster Tsavong Lah and the Priest Harrar's dictates, Czulkang lacked the necessary forces directly around his flagship to stop the incoming ram attack.

Czulkang had a villip communication opened with his son who was on captured Coruscant and informed him that while the planet was taken, the battle was in reality a loss and he himself would shortly be dead as too many clever minds, no matter how heretical, had undone him. He then wished his son well, imparting his final words to him before closing the call and turning to watch the incoming Lusankya approach his flagship. While he refused to cheapen his final words to his son, when asked if the worldship should be evacuated by a subordinate, Czulkang gave a nod affirming the action. Left alone he contemplated the constructed lance as much of the Lusankya's hull plating was burned away, showing the long explosive filled spike built along the interior central corridor and admired that while crudely constructed, it would serve its purpose well.

Davip successfully steered the deteriorating bow of the Lusankya into the enemy worldship just slightly above Czulkang Lah's command room, killing Lah instantly. Davip managed to escape from the Super Star Destroyer shortly before the collision via a Y-Wing stored in a nearby modified shuttle bay near the rear of the vessel. The force of the collision and resulting detonation was so great that it utterly destroyed both Domain Hul and the Lusankya herself, creating a massive explosion that could be seen from the other side of the system at Borleias itself. The loss of the flagship and Czulkang Lah both demoralized and disorganized the Vong in the system into a state of complete confusion, allowing the remaining New Republic forces to successfully retreat from the Pyria System.