C2057 Extreme Engraving

Ye Feng was lucky.

Although refining these materials was very tiring, there was no explosion. It could be considered as a blessing in disguise.

At the same time, he was also unlucky.

Although he had a very precise control over the refining process, the materials used to refine the Heaven Rank Spiritual Artifact were too tough.

In order to perfectly merge and fuse different materials