The golden, blue, red, and green colored lights, after destroying the enemies in front of them, converged together and expanded instantly in midair, like a giant net, covering the black fog. Ah Dai and the three others were of one mind; their goal was to leave no chance for the Nazgul to escape. The colored lights were filled with the enormous battle aura of the four Sword Saints, and the black fog seemed to sense the danger, twisting violently. The speed of the battle aura's advance was extremely fast, and in the blink of an eye, it had completed the encirclement, successfully trapping the black fog at the center. Ah Dai and the others simultaneously channeled their energy, their powerful battle aura constantly shrinking and pressing inward.