The Yuuzhan Vong concept of the ultimate annihilation of all existence was known as the Great Sacrifice. Each warrior held the conviction that their deeds throughout their lives would determine their specific rank or role within the Great Sacrifice. The notion of the Great Sacrifice underwent a change when Warmaster Tsavong Lah schemed to offer Jaina and Jacen Solo as sacrifices to the True Gods. His motivation was to guarantee the triumph of the Yuuzhan Vong invasion of the galaxy.