Under Lei Dong's command, each chief-level evil spirit turned into a shadowy wraith. Taking advantage of their ability to fly, they swooped down and wrapped themselves around the Swift Shadow Insects' heads and necks. Then they sprouted sharp claws and teeth, tearing at them with all their might. In just a few breaths, they could easily finish off an insect. The five evil spirits each fought on their own, and on average, they killed nearly one insect every breath.
The others also unleashed their strongest attacks, using the city wall to easily slaughter the Swift Shadow Insects one after another. Qian Luo and the other Golden Core Cultivators were especially formidable, their dazzling array of magic treasures filling the air. When the Swift Shadow Insects gathered together and tried to break through the Mountain Protecting Formation, their powerful spells proved even more impressive.
Of course, the Anti-air Formation also hindered the use of magic treasures and Magic Tools. Lei Dong's Crimson Refining Flying Sword was extraordinarily powerful, but he could only use it for attacks like shooting it straight at his enemies. He couldn't turn it into a dragonlike shape that could freely coil around and slaughter them. All he could do was send the Crimson Refining Flying Sword hurtling toward its target, then immediately make it spin back. Controlling it was exceedingly difficult.
Fortunately, the Crimson Refining Flying Sword was light enough for him to control with some effort. Black Iron Tower's life-bound magic treasure, for example, was unusable under these conditions. It was a pitch-black tower of dark iron, which he had fused with his soul through a heart-refining technique. Once summoned, it would grow larger and larger, eventually becoming a treasure tower more than ten zhang tall. Normally, this dark iron tower was most effective in a