Chapter 4158: A battle between secret skills

Lu Ming studied it carefully and memorized the ancient secret skill from the spiritual mark.

A moment later, the spiritual mark in his hand exploded like a firework.

Lu Ming's expression was calm because this was within his expectations. He had already memorized the ancient secret skill contained in the spiritual mark.

Then, Lu Ming took out another spiritual mark and started to comprehend it.

The safest thing to do was to remember it in his mind. In the future, when he exchanged it with the heavenly Palace, he only needed to make a copy.

Just like that, Lu Ming memorized all kinds of ancient secret skills in his mind. In an hour, he could memorize a few. His speed was very fast, and he could memorize sixty to seventy skills in a day.

A few days later, Lu Ming had already memorized hundreds of them.

Thump! "BOOM!"

On this day, Lu Ming was memorizing the ancient secret skill when he suddenly heard a violent roar.