Seeing the immense power of the ultimate technique he had practiced so hard to master, Xu Feng smiled with satisfaction.
However, in the very next instant, that smile vanished from his face, turning it pale.
While combining seven flying knives into one was undeniably powerful, the mana consumption grew exponentially as well. In just a short moment, he had used up thirty percent of his mana reserves. Combined with what he had expended earlier, the mana left in his dantian was now less than thirty percent.
Chapter 307