The End of April

After three days, Wu Ming finally broke through to the Advanced Battle General level as a Spirit Reader.

He mounted his Flying Sword, ready to head into the wilderness and test his newfound strength.

Whoosh!

In the sky, Wu Ming became a streak of silver light. A low roar trailed him as he swept over the city and plunged deep into the wilderness in the blink of an eye.

"My flying speed really has improved since the breakthrough."

Looking at the sonic boom cloud he had torn through the air, he nodded to himself. I didn't just break the sound barrier. I reached 500 meters per second.

The sound barrier was the resistance an object encountered as it approached the speed of sound and sharply compressed the air ahead of it.

For anything in flight, the closer its speed came to that threshold, the harder it became to go faster. It was like running into a wall built from air.

Breaking through that wall took far more thrust than usual.

When Wu Ming had first reached the Battle General level with his Spiritual Force, his flying speed had already hit 300 meters per second, putting him firmly in the subsonic range. But as he edged closer to the speed of sound, the resistance grew increasingly pronounced.

As a result, even though his Spiritual Force kept growing stronger, his flying speed rose more and more slowly. He could never break past the 340-meter-per-second mark.

Only when the Illusion Spirit Grass finished solidifying and his Spiritual Force reached the Advanced Battle General level did he finally have enough power to break through that barrier.

The instant he exceeded the speed of sound, something seemed to shatter behind him. Rings of visible air surged outward, followed by a deafening sonic boom.

And once