"In three seconds, I will start to kill everyone on my sight. One..."
Just after Yale spoke, the order of retreat reached the army, which made it seem like if their Emperor feared Yale to the point to obey what he said.
They might disregard Yale's words, but they would never doubt their Emperor, so they all started to run as fast as they could.
The only one that knew the truth was the leader, but he was the first to flee. After all, a potential God was far scarier than whatever the others were thinking.
However, no matter how fast they fled, they couldn't go out of Yale's reach in just three seconds.
Yale might be in problems facing them all simultaneously, but if they were focused on fleeing, he would be able to kill several.
Even the members of the army knew that a lot of them would die, but they just hoped that it would be someone else who was chased by Yale since he was only one person, and they were fleeing to different directions.