Chapter 2637: Heaven-defying comprehension

Rays of light and shadow intertwined, and the pattern before him became more and more intricate. However, Yue Kaili suddenly stopped and began to think hard.

After a moment of thought, Yue Kaili made a few more hand seals before stopping to think. It was obvious that the latter part of the technique was even more complicated, and he could no longer recall it.

This time, he thought for the time it takes half an incense stick to burn before making two hand seals. After that, he once again fell into deep thought. His movements became slower and slower, and the time he took to think grew longer and longer. In the end, he had to think for half a day before he could barely cast a spell.

Finally, Yue Kaili completely stopped what he was doing and fell into deep thought.