The gravitic superweapon was a "superweapon" that Kyp Durron claimed the Yuuzhan Vong were growing at the shipwomb in the remains of Sernpidal.
Claiming that it had the power to pull objects from thousands of kilometers away, and presenting a hologram of the supposed weapon drawing matter from Sernpidal's sun, Durron used Jaina Solo to take the information to General Wedge Antilles and Admiral Traest Kre'fey, hoping that they would help him destroy it. In truth, what they had seen was actually a dovin basal relay system used to provide helium and hydrogen to what the Yuuzhan Vong were really growing at Sernpidal—a civilian worldship. Kre'fey, Antilles, and Solo only realized this after they attacked and destroyed the worldship.
Claiming that it had the power to pull objects from thousands of kilometers away, and presenting a hologram of the supposed weapon drawing matter from Sernpidal's sun, Durron used Jaina Solo to take the information to General Wedge Antilles and Admiral Traest Kre'fey, hoping that they would help him destroy it. In truth, what they had seen was actually a dovin basal relay system used to provide helium and hydrogen to what the Yuuzhan Vong were really growing at Sernpidal—a civilian worldship. Kre'fey, Antilles, and Solo only realized this after they attacked and destroyed the worldship.