"Boom!"
A heavy explosion of compressed air erupted in front of the Prison Barrier. Terrifying magical power transformed into a tornado around the Valkyrie, whose entire body burned with rainbow flames, and began to sweep outward.
"Th... That is...!?"
Caught off guard, Kojo was almost blown away by the incoming storm of magical power. He hurriedly raised his arms to block the fierce wind and lowered his body to steady himself, barely managing to hold his ground. Even so, he was shaken by the sight of the Valkyrie appearing behind Number Six.
"So that's Number Six's Beast Vassal..."
Even Luo Zhen could not help raising one hand in front of his face as he stared at the mighty Valkyrie. He could feel the blood within his body boiling and roaring, as Beast Vassals of the same origin as his opponent surged within him.
Number Six, who had summoned the Beast Vassal, released magic power of the highest level and made her voice ring out.
"To undo the seal of the Prison Barrier, one needs both an excellent spatial-control formula and an enormous amount of magical power surpassing the Dragon Veins. Neither can be lacking. Even now that the Prison Barrier has manifested, entering it and breaking through the barrier still requires an attack fueled by magical power surpassing the Dragon Veins."
After all, the Prison Barrier was built with the Dragon Veins flowing through Kageno Island. Without power surpassing the Dragon Veins, how could it be destroyed?
Under ordinary circumstances, however, no individual could satisfy such conditions.
Even the Three Progenitors might not possess magical power surpassing the Dragon Veins. At most, they could rival them. Only the Fourth True Ancestor, hailed as the world's strongest vampire, possessed enough magical power to meet that condition.
Therefore, to undo the seal