Amidst the endless slaughter, Ye Mo didn't realize he had been surrounded by more than thousands of earth scorpions. He was killing them purely based on instinct. He killed wave after wave.
If someone stood in the air right now, they would see endless earth scorpions flooding towards one person. But that wave of monsters was stopped by some power in the center, unable to flood the person in the middle.
In the end, Ye Mo closed his eyes completely and just controlled his sword rays based on his sense for danger. The intelligence in the sword rays grew. He kept on attacking with sword rays to unearth that intelligence. Each time a scorpion attacked, it would be blocked by his sword rays and then create a mist of blood. But even then, there were too many scorpions, and some made it through and injured him.