Just as Mu was struggling to hold on, a chant suddenly rang out. It was not any human language, but a kind of speech Li had never heard before. Mu understood that this was a prayer the descended apostles used to enhance their combat power.
Every apostle was inherently extremely powerful. It was only that when they came to this world, these bodies greatly suppressed their combat abilities. This prayer forcibly allowed its user to break through the limits of the human body and reach a state close to their original strength. However, the prayer was exceedingly cumbersome to use, and its effects were very brief. Even if it allowed them to kill the enemy outright, its backlash was immense. First, the body carrying their soul would begin to collapse. Even if they could barely move afterward, should anything else happen, there would be no saving them.
Even if nothing else went wrong afterward, their strength would decline, and they could only return to the temple to wait for their bodies to slowly collapse, allowing their souls to ascend back to their original world.
Hearing the prayer, anger surged onto Index's face. "Acnologia! Acnologia! So you really are Acnologia's lackeys! Die!" Index's attacks immediately became incomparably vicious, making Mu's movements even more difficult. Yet he understood that he could not retreat now. If Index disrupted Saga's prayer, the two of them would truly be buried here.
After several attacks from Index, Mu was completely unable to hold on any longer. At that very moment, the battlefield suddenly trembled. Saga seemed to turn into an enormous sun in an instant, slowly rising from the ground. Dazzling light burned continuously from his body, as if he were a mass of condensed energy!
"Galaxy Starburst!" A roar suddenly burst from within the light.